Amblystegiaceae FH: 00544574 Amblystegium serpens (Linnaeus) Schimper USA: New Mexico Santa Fe: [no additional data] M. E. Mathias 603
FH: 00539697 Cratoneuron filicinum (Hedwig) Spruce USA: New Mexico Santa Fe: [data not captured] M. E. Mathias 604
Apiaceae GH: 00075902 Aulospermum minimum Mathias USA: Utah On the upper part of the "Breaks", Cedar Bre... M. E. Mathias 723 1929-7-19
GH: 00404395 Ligusticum apiifolium (Nuttall ex Torrey & A. Gray) A. Gray USA: California Madrona Forest Camp, on the Smith River M. E. Mathias 766 1929-8-5
GH: 00424321 Oreonana vestita (S. Watson) Jepson USA: California summit of San Antonio Mountain (Baldy) M. E. Mathias 934 1932-6-23
Apocynaceae GH: 02179532 Apocynum androsaemifolium Linnaeus USA: South Dakota Deadwood: Spearfish Canyon, near Deadwood M. E. Mathias 789 1929-8-25
GH: 02179939 Apocynum cannabinum Linnaeus USA: New Mexico along the highway through Cimarron Canyon, n... M. E. Mathias 558 1929-6-30
GH: 02178195 Apocynum floribundum Greene USA: Colorado along the road near Morley M. E. Mathias 490 1929-6-29
Asteraceae GH: 00414765 Adenophyllum cooperi (A. Gray) Strother USA: California Mohave Desert, along road from Victorville t... M. E. Mathias 866 1931-5-24
GH: 00414765 Dyssodia cooperi A. Gray USA: California Mohave Desert, along road from Victorville t... M. E. Mathias 866 1931-5-24
GH: 00417553 Erigeron parishii A. Gray USA: California Cushenberry Springs M. E. Mathias 858 1931-5-24
GH: 00414852 Eriophyllum confertiflorum (de Candolle) A. Gray USA: California along the trail above the end of the public ... M. E. Mathias 843 1951-5-9
GH: 00414875 Eriophyllum confertiflorum (de Candolle) A. Gray USA: California along trail up San Antonio Mountain (Baldy) M. E. Mathias 941 1931-6-23
GH: 02204816 Heterotheca villosa scabra (Eastwood) Semple USA: Colorado Mesa Verde National Park M. E. Mathias 639 1929-7-8
GH: 01832111 Hieracium Horridum Fries USA: California [data not captured] M. E. Mathias 883 1931-6-10
GH: 01835394 Lygodesmia juncea D. Don USA: Nebraska along highway 30 miles east of McCook M. E. Mathias 313 1929-6-18
Berberidaceae A: 02168737 Berberis fendleri A. Gray USA: New Mexico along the highway through Cimarron Canyon, n... M. E. Mathias 568 1929-6-30
GH: 02169114 Mahonia aquifolium (Pursh) Nuttall USA: Colorado Estes Park: Fern Lake Trail M. E. Mathias 392 1929-6-20
Boraginaceae GH: 01996678 Lithospermum multiflorum Torrey USA: New Mexico Raton Pass, north of Raton M. E. Mathias 503 1929-6-29
GH: 01997515 Mertensia arizonica Greene USA: Utah above the Breaks, Cedar Breaks M. E. Mathias 686 1929-7-19
Brachytheciaceae FH: 00515757 Chamberlainia collina (Schleicher ex Müller Halle) H. Robinson USA: Colorado [data not captured] M. E. Mathias 644b
Brassicaceae GH: 01097594 Cakile edentula (Bigelow) Hooker USA: Washington [data not captured] M. E. Mathias 776 1929-8-11
GH: 00403872 Caulanthus amplexicaulis S. Watson USA: California along trail up San Antonio Mountain (Baldy) M. E. Mathias 929 1931-6-23
GH: 00379492 Erysimum capitatum (Douglas ex Hooker) Greene USA: California Slope north of west entrance to Edwards Air ... M. E. Mathias 3027 1957-3-6
Bryaceae FH: 00797806 Bryum angustirete Kindberg USA: New Mexico Santa Fe: [data not captured] M. E. Mathias 596
FH: 00798923 Bryum inclinatum (Hedwig) Dickson ex Withering USA: Colorado Estes Park: [no additional data] M. E. Mathias 420
Capparaceae GH: 01872277 Peritoma serrulata (Pursh) de Candolle USA: Colorado along highway between Sterling and Fort Coll... M. E. Mathias 343 1929-6-19
Caryophyllaceae GH: 01742787 Cerastium arvense Linnaeus USA: Colorado Estes Park: Fern Lake Trail M. E. Mathias 399 1929-6-20
Commelinaceae GH: 02113604 Tradescantia laramiensis Goodding USA: Colorado along highway west of Fleming M. E. Mathias 329 1929-6-19
Cupressaceae A: 02105416 Juniperus monosperma Sargent USA: New Mexico Santa Fe Canyon, near Santa Fe M. E. Mathias 601 1929-7-1
Ditrichaceae FH: 00793312 Distichium capillaceum (Hedwig) Bruch & Schimper USA: Colorado [data not captured] M. E. Mathias 416
Ephedraceae GH: 01689621 Ephedra sp. USA: Colorado Spruce Canyon, near camp ground, Mesa Verde ... M. E. Mathias 645 1929-7-8
GH: 00933592 Ephedra torreyana S. Watson USA: New Mexico along Cuba Road, near Bloomfield M. E. Mathias 614 1929-7-5
Ericaceae GH: 00350881 Arctostaphylos patula Greene USA: California San Bernardino Mountains: along the brook be... M. E. Mathias 889 1931-6-10
A: 01117574 Arctostaphylos patula Greene USA: Utah east of Cedar Breaks M. E. Mathias 714 1929-7-18
Fabaceae GH: 02047515 Astragalus convallarius Greene USA: Utah along the upper part of the Breaks, Cedar Br... M. E. Mathias 731 1929-7-19
GH: 02047516 Astragalus convallarius Greene USA: Utah along the upper part of the Breaks, Cedar Br... M. E. Mathias 732 1929-7-19
GH: 02049279 Astragalus mollissimus Torrey USA: Colorado on hill west of Sterling M. E. Mathias 353 1929-6-19
GH: 02049941 Astragalus pectinatus (Douglas ex Hooker) Douglas ex G. Don USA: Colorado along highway between Sterling and Fort Coll... M. E. Mathias 348 1929-6-19
GH: 02048128 Astragalus preussii A. Gray USA: New Mexico along the road between Lybrooks and Simpson,... M. E. Mathias 609 1929-7-4
GH: 02048587 Astragalus scopulorum Porter USA: Nebraska along highway 30 miles east of McCook M. E. Mathias 314 1929-6-18
GH: 02030513 Astragalus sp. USA: Colorado roadside, between Sterling and Ft. Collins M. E. Mathias 344 1929-6-19
GH: 01958149 Hedysarum boreale Nuttall USA: New Mexico Cimarron Canyon, near Cimarron M. E. Mathias 556 1929-6-30
GH: 02148547 Lathyrus brachycalyx eucosmus (Butters & H. St. John) S. L. Welsh USA: New Mexico Raton Pass, north of Raton M. E. Mathias 504 1929-6-29
GH: 02085221 Lupinus argenteus Pursh USA: Colorado along Masonville Road west of Fort Collins, ... M. E. Mathias 374 1929-6-20
GH: 02085961 Lupinus caudatus argophyllus (A. Gray) L. Ll. Phillips USA: New Mexico Santa Fe Canyon, near Santa Fe M. E. Mathias 591 1929-7-1
GH: 02131754 Pediomelum argophyllum (Pursh) Rydberg USA: Nebraska 20 miles west of Hastings M. E. Mathias 301 1929-6-17
GH: 02131870 Pediomelum cuspidatum (Pursh) Rydberg USA: Nebraska along highway 30 miles east of McCook M. E. Mathias 317 1929-6-18
A: 02134875 Robinia luxurians Rydberg USA: New Mexico on north slopes of Raton Pass, near Raton M. E. Mathias 502 1929-6-29
GH: 02464201 Trifolium monanthum grantianum (A. Heller) J. M. Gillett USA: California between Bluff Lake and The Eyrie, San Bernar... M. E. Mathias 903 1931-6-10
Geraniaceae GH: 01864869 Geranium parryi (G. Engelmann ex A. Gray) A. Heller USA: Colorado along Masonville Road west of Fort Collins M. E. Mathias 363 1929-6-20
Hydrophyllaceae GH: 00402930 Eriodictyon trichocalyx A. Heller USA: California slopes below Cushenberry Springs M. E. Mathias 859 1931-5-24
Iridaceae GH: 01747485 Iris missouriensis Nuttall USA: New Mexico bordering Eagle Lake, near Taos M. E. Mathias 550 1929-6-30
Krameriaceae GH: 00347656 Krameria erecta Willdenow ex Schultes USA: California Cushenberry Springs M. E. Mathias 861 1931-5-24
Lamiaceae GH: 01598799 Poliomintha incana (Torrey) A. Gray USA: New Mexico along the Cuba Road, south of Bloomfield M. E. Mathias 615 1929-7-5
GH: 00401578 Salazaria mexicana Torrey USA: California slopes below Cushenberry Springs M. E. Mathias 864 1931-5-24
Linaceae GH: 02053165 Linum lewisii Pursh USA: Colorado along Masonville Road west of Fort Collins M. E. Mathias 355 1929-6-20
Loranthaceae GH: 00355092 Phoradendron bolleanum (Seemann) Eichler USA: California Wild Rose Canyon, Panamint Mountains M. E. Mathias 826 1931-4-18
GH: 00355120 Phoradendron tomentosum (de Candolle) Engelmann ex A. Gray USA: California along the highway east of Paso Robles M. E. Mathias 740 1929-7-29
GH: 00355120 Phoradendron villosum (Nuttall) Nuttall ex Engelmann USA: California along the highway east of Paso Robles M. E. Mathias 740 1929-7-29
Malvaceae GH: 02202257 Callirhoe involucrata (Torrey & A. Gray) A. Gray USA: Nebraska Hastings: along highway 20 miles west of Has... M. E. Mathias 305 1929-6-17
GH: 02199562 Sphaeralcea coccinea (Nuttall) Rydberg USA: Nebraska 20 miles west of Hastings M. E. Mathias 306 1929-6-17
GH: 02198098 Sphaeralcea parvifolia A. Nelson USA: Arizona along the road to Jacob's Lake, Kaibab Plate... M. E. Mathias 657 1929-7-14
Mimosaceae GH: 01992605 Schrankia nuttallii Standley USA: Nebraska along highway 30 miles east of McCook M. E. Mathias 315 1929-6-18
Nyctaginaceae GH: 01846280 Mirabilis multiflora (Torrey) A. Gray USA: New Mexico south of Raton on the road to Taos M. E. Mathias 1929-6-30
GH: 01846689 Tripterocalyx carneus carneus (Greene) L. A. Galloway USA: New Mexico along Cuba Road, near Huerfano Mesa, northwe... M. E. Mathias 1929-7-4
Onagraceae GH: 01625220 Camissonia boothii desertorum (Munz) P. H. Raven USA: California Mohave Desert, near Valley Wells, Trona Cali... M. E. Mathias 800 1931-4-18
GH: 01778460 Gayophytum diffusum diffusum A. Gray & Torrey USA: Idaho Warm River M. E. Mathias 783 1929-8-16
GH: 01645580 Oenothera coronopifolia A. Gray & Torrey USA: Colorado along highway west of Fleming M. E. Mathias 327 1929-6-19
Orchidaceae GH: 01938111 Corallorhiza maculata (Rafinesque) Rafinesque USA: California between Bluff Lake and The Eyrie, San Bernar... M. E. Mathias 906 1931-6-10
AMES: 00101060 Lycaste mathiasiae G. C. Kennedy Peru: Tinog Maria M. E. Mathias s.n.
Orobanchaceae GH: 01877934 Castilleja miniata Douglas ex Hooker USA: California San Bernardino Mountains: along brook betwee... M. E. Mathias 897 1931-6-10
Pinaceae A: 00396569 Picea engelmannii Parry ex Engelmann USA: Utah Cedar Breaks, near Cedar City M. E. Mathias 720 1929-7-19
GH: 00396573 Picea engelmannii Parry ex Engelmann USA: Utah Cedar Breaks, near Cedar City M. E. Mathias 719 1929-7-19
A: 00246814 Pinus contorta murrayana (Balfour) Critchfield USA: California near summit of San Antonio Mountain (Baldy) M. E. Mathias 949 1931-6-23
A: 00246814 Pinus contorta murrayana (Balfour) Engelmann USA: California near summit of San Antonio Mountain (Baldy) M. E. Mathias 949 1931-6-23
A: 00398558 Pinus edulis Engelmann USA: New Mexico Near Bernalillo, on Cuba Road M. E. Mathias 606 1929-7-3
A: 00357162 Pinus radiata D. Don USA: California Monterey: Along coast south of the Presidio,... M. E. Mathias 765 1929-7-30
A: 01113378 Pseudotsuga menziesii (Mirbel) Franco USA: Colorado Aspen-glan Camp, Fall River Road, near Estes... M. E. Mathias 440 1929-6-22
A: 01113386 Pseudotsuga menziesii (Mirbel) Franco USA: Colorado Estes Park: Fern Lake Trail M. E. Mathias 378 1929-6-20
GH: 01113405 Pseudotsuga menziesii (Mirbel) Franco USA: Colorado Fall River Road, near Estes Park M. E. Mathias 440 1929-6-22
Plantaginaceae GH: 02002051 Penstemon ambiguus Torrey USA: New Mexico near Bernalillo on the road to Cuba M. E. Mathias 608 1929-7-3
GH: 02002693 Penstemon barbatus torreyi (Bentham) A. Gray USA: Colorado along the road near Morley M. E. Mathias 493 1929-6-29
GH: 02119803 Penstemon glaber brandegeei (Porter) C. C. Freeman USA: Colorado along the highway near Morley M. E. Mathias 492 1929-6-29
GH: 02120136 Penstemon grinnellii Eastwood USA: California [data not captured] M. E. Mathias 945 1931-6-23
GH: 01801262 Penstemon virens Pennell ex Rydberg USA: Colorado Estes Park: Fern Lake Trail M. E. Mathias 388 1929-6-20
Polemoniaceae GH: 01105140 Leptosiphon brevicula (A. Gray) J. M. Porter & L. A. Johnson USA: California [data not captured] M. E. Mathias 894 1931-6-10
GH: 00385248 Linanthus sp. USA: California Along trail to The Eyrie, near Bluff Lake M. E. Mathias 895 1931-6-10
Polygonaceae GH: 01717496 Chorizanthe brevicornu Torrey USA: California Mohave Desert, along road from Deadman's Poi... M. E. Mathias 874 1931-5-24
GH: 01618628 Eriogonum cernuum Nuttall USA: Arizona Kaibab Plateau, near Jacob's Lake M. E. Mathias 656 1929-7-14
GH: 01966954 Eriogonum thomasii Torrey USA: California [data not captured] M. E. Mathias 803 1931-4-18
GH: 02043204 Eriogonum umbellatum Torrey USA: Colorado along Masonville Road west of Fort Collins M. E. Mathias 364 1929-6-20
Portulacaceae GH: 01858298 Cistanthe monosperma (Greene) Hershkovitz USA: California San Bernardino Mountains: near Bluff Lake M. E. Mathias 913 1931-6-8
Pottiaceae FH: 01135873 Tortula ruralis (Hedwig) G. Gaertner, B. Meyer & Scherbius USA: Colorado [data not captured] M. E. Mathias 644a
Pucciniaceae FH: 00949524 Puccinia rufescens Dietel & Holway USA: California San Bernardino Mts. M. E. Mathias 1931-6-8
Ranunculaceae GH: 01708062 Anemone patens multifida Pritzel USA: Colorado along Masonville Road west of Fort Collins M. E. Mathias 372 1929-6-20
GH: 01709058 Aquilegia coerulea pinetorum (Tidestrom) Kearney & Peebles USA: Utah Cedar Breaks, near Cedar City M. E. Mathias 717 1929-7-19
GH: 01658271 Delphinium barbeyi (Huth) Huth USA: Utah above the Breaks, Cedar Breaks M. E. Mathias 694 1929-7-19
GH: 00369709 Delphinium gypsophilum Ewan USA: California 10.2 miles west of McKittrick on Hwy 178 M. E. Mathias 822 1950-4-27
GH: 00369708 Delphinium gypsophilum Ewan USA: California Carizzo Plains near Soda Lake M. E. Mathias 824B 1953-4-27
GH: 01839041 Thalictrum fendleri Engelmann ex A. Gray USA: Utah above the Breaks, Cedar Breaks M. E. Mathias 703 1929-7-19
Rosaceae GH: 00345461 Cercocarpus ledifolius Nuttall USA: California near The Eyrie, near Bluff Lake, San Bernard... M. E. Mathias 888 1931-6-10
GH: 01606064 Fallugia paradoxa (D. Don) Endlicher USA: New Mexico along the highway through Cimarron Canyon, n... M. E. Mathias 549 1929-6-30
A: 01606105 Fallugia paradoxa (D. Don) Endlicher USA: New Mexico along the highway through Cimarron Canyon, n... M. E. Mathias 549 1929-6-30
A: 00346757 Prunus demissa (Nuttall) Walpers USA: California along trail up San Antonio Mountain (Baldy) M. E. Mathias 927 1931-6-23
A: 00346757 Prunus virginiana demissa (Nuttall) Torrey USA: California along trail up San Antonio Mountain (Baldy) M. E. Mathias 927 1931-6-23
A: 01725581 Prunus virginiana demissa (Nuttall) Torrey USA: Colorado Estes Park: Fern Lake Trail M. E. Mathias 435 1929-6-20
GH: 01556538 Purshia tridentata (Pursh) de Candolle USA: Colorado Estes Park: Fern Lake Trail M. E. Mathias 402 1929-6-20
A: 01556551 Purshia tridentata (Pursh) de Candolle USA: Colorado Estes Park: Fern Lake Trail M. E. Mathias 402 1929-6-20
A: 01556553 Purshia tridentata (Pursh) de Candolle USA: Colorado Estes Park: Fern Lake Trail M. E. Mathias 402 1929-6-20
Rubiaceae GH: 02359718 Galium coloradoense W. Wight USA: Colorado Spruce Canyon, near camp ground, Mesa Verde ... M. E. Mathias 640 1929-7-8
GH: 00417001 Galium gabrielense (Munz) I. M. Johnston USA: California above Camp Baldy, San Antonio Mountain (Bald... M. E. Mathias 939 1931-6-23
GH: 00417001 Galium sp. USA: California above Camp Baldy, San Antonio Mountain (Bald... M. E. Mathias 939 1931-6-23
Scrophulariaceae GH: 00367144 Diplacus longiflorus Nuttall USA: California at the end of the public road, West Fork of ... M. E. Mathias 849 1931-5-9
GH: 00367144 Mimulus aurantiacus pubescens (Torrey) D. M. Thompson USA: California at the end of the public road, West Fork of ... M. E. Mathias 849 1931-5-9
Solanaceae GH: 01542061 Quincula lobata (Torrey) Rafinesque USA: Colorado along the highway between Pueblo and Walsenb... M. E. Mathias 511 1929-6-29
GH: 00267019 Solanum californicum Dunal USA: California Near fire tower, Chew's Ridge (8 miles north... M. E. Mathias 1312 1937-5-30
GH: 00267019 Solanum umbelliferum Eschscholtz USA: California Near fire tower, Chew's Ridge (8 miles north... M. E. Mathias 1312 1937-5-30