Orobanchaceae GH: 02035541 Agalinis aspera (Douglas ex Bentham) Britton USA: Nebraska Lincoln County; along N. Platte R., North Pl... F. W. Pennell 6405 1915-8-18
GH: 02034832 Agalinis tenuifolia parviflora (Nuttall) Pennell USA: Nebraska Lincoln County; 5-7 m. n. of North Platte F. W. Pennell 6406 1915-8-18
GH: 01877272 Castilleja integra A. Gray USA: Colorado west of Pueblo F. W. Pennell 5735 1915-6-6
GH: 00078717 Melampyrum lineare pectinatum Pennell USA: New Jersey Tom's River, dry sandy pineland F. W. Pennell 6522 1915-9-10
Plantaginaceae GH: 01998041 Chelone glabra Linnaeus USA: New York [data not captured] F. W. Pennell 6643 1915-9-23
GH: 01998070 Chelone glabra Linnaeus USA: Pennsylvania [data not captured] F. W. Pennell 6480 1915-8-31
GH: 01998232 Chionophila jamesii Bentham USA: Colorado above timberline, Pikes Peak F. W. Pennell 6330 1915-8-5
GH: 01998751 Collinsia parviflora Lindley USA: Idaho [data not captured] F. W. Pennell 6051 1915-7-9
GH: 01998719 Collinsia parviflora Lindley USA: Colorado w. of Golden F. W. Pennell 5818 1915-6-13
GH: 01998898 Collinsia parviflora Lindley USA: Wyoming Depressions near summit of Medicine Butte, 1... F. W. Pennell 5911 1915-6-25
GH: 01998894 Collinsia parviflora Lindley USA: Wyoming Upper Geyser Basin; Yellowstone National Par... F. W. Pennell 6005 1915-7-4
GH: 01999375 Gratiola aurea Muhlenberg USA: New Jersey [data not captured] F. W. Pennell 6500 1915-9-3
GH: 01999817 Gratiola pilosa Michaux USA: New Jersey [data not captured] F. W. Pennell 6491 1915-9-2
GH: 02001550 Nuttallanthus canadensis (Linnaeus) D. A. Sutton USA: New Jersey [data not captured] F. W. Pennell 6488 1915-9-2
GH: 02001718 Nuttallanthus texanus (Scheele) D. A. Sutton USA: Colorado base of Horsetooth Mt. F. W. Pennell 5856 1915-6-17
GH: 00091131 Penstemon aggregatus Pennell USA: Wyoming 1-2 miles south of Evanston, edge of draw on... F. W. Pennell 5918 1915-6-26
GH: 02001951 Penstemon albidus Nuttall USA: Nebraska n. e. of Ogallala F. W. Pennell 6401 1915-8-17
GH: 02002145 Penstemon angustifolius Nuttall ex Pursh USA: Nebraska n. e. of Ogallala F. W. Pennell 6402 1915-8-17
GH: 02002178 Penstemon angustifolius caudatus (A. Heller) D. D. Keck USA: Colorado 1-2 m. n. w. of Canon City F. W. Pennell 6311 1915-8-3
GH: 02002213 Penstemon arenicola A. Nelson USA: Wyoming 7-10 m. s. w. of Wamsutter (nearest Red Dese... F. W. Pennell 5881 1915-6-22
GH: 02002429 Penstemon attenuatus pseudoprocerus (Rydberg) Cronquist USA: Wyoming Yellowstone National Park; s. of Mammoth Hot... F. W. Pennell 6035 1915-7-7
GH: 00091146 Penstemon auriberbis Pennell USA: Colorado Northeast of Pueblo, dry sandy sage brush sl... F. W. Pennell 5731 1915-6-5
GH: 02002457 Penstemon auriberbis Pennell USA: Colorado 1 m. n.w. of Canon City F. W. Pennell 6312 1915-8-3
GH: 02002975 Penstemon caespitosus Nuttall ex A. Gray USA: Wyoming 2 m. n. of Evanston F. W. Pennell 5895 1915-6-24
GH: 02118343 Penstemon comarrhenus A. Gray USA: Colorado 3 m. n. e. of Glenwood Springs F. W. Pennell 6159 1915-7-20
GH: 02118357 Penstemon comarrhenus A. Gray USA: Utah n. of Helper F. W. Pennell 6142 1915-7-18
GH: 02118587 Penstemon cyananthus Hooker USA: Idaho [data not captured] F. W. Pennell 6062 1915-7-10
GH: 02118580 Penstemon cyananthus Hooker USA: Idaho [data not captured] F. W. Pennell 6046 1915-7-9
GH: 02118606 Penstemon cyananthus Hooker USA: Utah near Altus, Parleys Cañon F. W. Pennell 5962 1915-6-29
GH: 02118605 Penstemon cyananthus Hooker USA: Utah s. of Devils Slide F. W. Pennell 5943 1915-6-28
GH: 02118676 Penstemon cyaneus Pennell USA: Wyoming s. of Mammoth Hot Springs; Yellowstone Natio... F. W. Pennell 6034 1915-7-7
GH: 02118917 Penstemon deustus Douglas USA: Wyoming n. of Golden Gate; Yellowstone National Park F. W. Pennell 6029 1915-7-7
GH: 02119232 Penstemon eatonii A. Gray USA: Utah Castle Gate F. W. Pennell 6137 1915-7-18
GH: 02119527 Penstemon fremontii Torrey & A. Gray USA: Wyoming 5 m. s.w. of Wamsutter F. W. Pennell 5884 1915-6-22
GH: 02119614 Penstemon fruticosus (Pursh) Greene USA: Wyoming n. of Golden Gate; Yellowstone National Park F. W. Pennell 6030 1915-7-7
GH: 02119723 Penstemon glaber Pursh USA: Colorado [data not captured] F. W. Pennell 6374A 1915-8-10
GH: 02119739 Penstemon glaber Pursh USA: Colorado along S. Platte R., Valverde F. W. Pennell 5842 1915-6-15
GH: 02119734 Penstemon glaber Pursh USA: Colorado along river, Valverde F. W. Pennell 6390 1915-8-12
GH: 02120162 Penstemon hallii A. Gray USA: Colorado Above timberline, Pikes Peak F. W. Pennell 6328 1915-8-5
GH: 02120177 Penstemon harbouri A. Gray USA: Colorado along Horsethief Trail, east of Ouray above ... F. W. Pennell 6236 1915-7-28
GH: 02120354 Penstemon hirsutus (Linnaeus) Willdenow USA: Pennsylvania [data not captured] F. W. Pennell 6716 1915-5-31
GH: 02120428 Penstemon humilis Nuttall ex A. Gray USA: Idaho [data not captured] F. W. Pennell 6063 1915-7-10
GH: 02120479 Penstemon humilis Nuttall ex A. Gray USA: Utah s. of Echo F. W. Pennell 5936 1915-6-27
GH: 02120478 Penstemon humilis Nuttall ex A. Gray USA: Utah Near mouth of Provo Cañon F. W. Pennell 6112 1915-7-16
GH: 02120476 Penstemon humilis Nuttall ex A. Gray USA: Utah Emigration Cañon near Pine Crest Inn. F. W. Pennell 5986 1915-7-2
GH: 02120475 Penstemon humilis Nuttall ex A. Gray USA: Utah South Fork of Big Cottonwood Creek near L. B... F. W. Pennell 5975 1915-7-1
GH: 02120924 Penstemon leonardii Rydberg USA: Utah Parley's Cañon e. of Barclay. F. W. Pennell 5953 1915-6-29
GH: 02120926 Penstemon leonardii Rydberg USA: Utah Emigration Cañon; Pinecrest Inn. F. W. Pennell 5985 1915-7-2
GH: 02121038 Penstemon moffatii Eastwood USA: Colorado 2 m. s. of Grand Junction F. W. Pennell 6173 1915-7-22
GH: 02121319 Penstemon osterhoutii Pennell USA: Colorado s.w. of Glenwood Springs F. W. Pennell 6158 1915-7-19
GH: 02121383 Penstemon pachyphyllus (A. Gray) Rydberg USA: Utah n. of Helper F. W. Pennell 6143 1915-7-18
GH: 02121664 Penstemon platyphyllus Rydberg USA: Utah near mouth of Parley's Cañon F. W. Pennell 5957 1915-6-29
GH: 02121663 Penstemon platyphyllus Rydberg USA: Utah near mouth of Big Cottonwood Cañon F. W. Pennell 6067 1915-7-12
GH: 02121860 Penstemon procerus Douglas ex Graham USA: Utah w. of Soldier Summit F. W. Pennell 6130 1915-7-17
GH: 02121854 Penstemon procerus Douglas ex Graham USA: Utah w. of Gorgoza Parley's Cañon F. W. Pennell 5964 1915-6-29
GH: 02121889 Penstemon procerus Douglas ex Graham USA: Wyoming Yellowstone National park; near Swan Lake F. W. Pennell 6036 1915-7-7
GH: 02122041 Penstemon radicosus A. Nelson USA: Idaho [data not captured] F. W. Pennell 6064 1915-7-10
GH: 02122043 Penstemon radicosus A. Nelson USA: Wyoming on mountain, 1-2 m. s. of Evanston F. W. Pennell 5920 1915-6-26
GH: 02122085 Penstemon radicosus A. Nelson USA: Wyoming 3 m. s.w. of Wamsutter F. W. Pennell 5883 1915-6-22
GH: 02122082 Penstemon radicosus A. Nelson USA: Wyoming on hill n. of Rawlins F. W. Pennell 5879 1915-6-21
GH: 02122307 Penstemon rydbergii A. Nelson USA: Colorado at Sargents F. W. Pennell 6293 1915-8-1
GH: 02122303 Penstemon rydbergii A. Nelson USA: Colorado Tolland: 'Boulder Park' F. W. Pennell 6371 1915-8-10
GH: 00091131 Penstemon rydbergii aggregatus (Pennell) N. H. Holmgren USA: Wyoming 1-2 miles south of Evanston, edge of draw on... F. W. Pennell 5918 1915-6-26
GH: 02122362 Penstemon rydbergii aggregatus (Pennell) N. H. Holmgren USA: Utah w. of Soldier Summit F. W. Pennell 6131 1915-7-17
GH: 02122406 Penstemon secundiflorus Bentham USA: Colorado near summit of Horsetooth Mt. F. W. Pennell 5860 1915-6-17
GH: 02122405 Penstemon secundiflorus Bentham USA: Colorado North Cheyenne Cañon F. W. Pennell 5773 1915-6-8
GH: 00091401 Penstemon secundiflorus lavendulus Pennell USA: Colorado Bluff of Baculite Mesa, 6 miles northeast of... F. W. Pennell 5739 1915-6-7
GH: 02122461 Penstemon sepalulus A. Nelson USA: Utah Near mouth of Provo Cañon (Springdell) F. W. Pennell 6110 1915-7-16
GH: 02122754 Penstemon strictus Bentham USA: Colorado on Sapinero Mesa F. W. Pennell 6271 1915-7-31
GH: 02122752 Penstemon strictus Bentham USA: Colorado on mt. s. w. of Glenwood Springs F. W. Pennell 6146 1915-7-19
GH: 02122844 Penstemon subglaber Rydberg USA: Utah slope, Soldier Summit F. W. Pennell 6129 1915-7-17
GH: 02122924 Penstemon teucrioides Greene USA: Colorado e. of Sargents F. W. Pennell 6302 1915-8-2
GH: 02122922 Penstemon teucrioides Greene USA: Colorado 2-3 m. n. w. of Sapinero; On Sapinero Mesa F. W. Pennell 6268 1915-7-31
GH: 01801224 Penstemon versicolor Pennell USA: Colorado mesas w. of Pueblo F. W. Pennell 6315 1915-8-4
GH: 01801222 Penstemon versicolor Pennell USA: Colorado mesas w. of Pueblo F. W. Pennell 5734 1915-6-6
GH: 00091503 Penstemon virens Pennell ex Rydberg USA: Colorado North of Morrison, stony granitic hillside, ... F. W. Pennell 5821 1915-6-13
GH: 01801264 Penstemon virens Pennell ex Rydberg USA: Colorado e. of Palmer Lake F. W. Pennell 5807 1915-6-11
GH: 01801251 Penstemon virens Pennell ex Rydberg USA: Colorado North Cheyenne Cañon F. W. Pennell 6339 1915-8-5
GH: 01801379 Penstemon watsonii A. Gray USA: Utah summit of mesa, Castle Gate F. W. Pennell 6140 1915-7-18
GH: 01801449 Penstemon whippleanus A. Gray USA: Colorado n. of Mirror Lake. Near Timberline, Pikes Pe... F. W. Pennell 6326 1915-8-5
GH: 01801444 Penstemon whippleanus A. Gray USA: Colorado along Sneffels Creek, southwest of Ouray F. W. Pennell 6210 1915-7-27
GH: 01801488 Penstemon whippleanus A. Gray USA: Utah w. of Silver Lake F. W. Pennell 104 1915-7-15
Scrophulariaceae GH: 02041512 Limosella australis R. Brown USA: New Jersey Old Sams Pond. Point Pleasant F. W. Pennell 6635 1915-9-22
GH: 02040049 Scrophularia lanceolata Pursh USA: Utah South fork og Big Cottonwood Creek F. W. Pennell 5974 1915-7-1