WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 707 
71. RUDBECKIA L. 
Perennial herbs with alternate, simple or divided leaves and large showy heads 
terminating the stems or branches; ray flowers neutral, those of the disk perfect; 
bracts foliaceous, spreading, in about 2 series; receptacle conic or elongated; achenes 
4-angled, prismatic; pappus a coriaceous, often 4-toothed crown. 
KEY TO THE SPECIES. 
Leaves entire or sparingly toothed; plants hirsute.................--- 1. R. flava. 
Leaves, except the uppermost, 3 to 5-cleft or pinnatifid; plants gla- 
brous or nearly 8O.......-- 0 eee eee eee ee ee eee eee eee 2. R. laciniata. 
1. Rudbeckia flava Moore, Pittonia 4: 179. 1900. BLACK-EYED SUSAN. 
Tyre Locauity: ‘‘Near the Big Muddy, Wyoming.” 
Rance: Wyoming and North Dakota to Colorado and New Mexico. 
New Mexico: Santa Fe and Las Vegas mountains; Ensenada; Rio Pueblo. Open 
slopes and meadows, in the Transition Zone. 
2. Rudbeckia laciniata L. Sp. Pl. 907. 1753. CoNE FLOWER, 
Rudbeckia ampla A. Nels. Bull. Torrey Club 28: 234. 1901. 
Tyre Locauity: “Habitat in Virginia, Canada.”’ 
Ranae: Idaho and Arizona to Quebec and Florida. 
New Mexico: Tunitcha Mountains; Chama; Santa Fe and Las Vegas mountains; 
Mogollon Mountains; White Mountains. Along streams and in damp thickets, in the 
Transition and Canadian zones, 
72. GYMNOLOMIA H. B. K. 
Annual or perennial herbs or low shrubs with chiefly opposite leaves and medium- 
sized pedunculate heads with yellow rays; involucre hemispheric, with numerous 
bracts in 2 to 4 series; receptacle conic, chaffy; rays flowers neutral; disk flowers 
numerous, perfect; achenes obovoid, thickish, somewhat compressed laterally or 
4-angled, rounded at the summit; pappus none, rarely a ring of 2 to 4 laciniate scales. 
KEY TO THE SPECIES. 
Stems shrubby; disk and receptacle low; leaves pinnately parted.... 1. G. tenuifolia. 
Stems herbaceous; disk and receptacle high; leaves entire or spar- 
ingly toothed. 
Pubescence mostly loose and spreading; leaves (linear or nearly 
so) conspicuously ciliate for almost their whole length; 
bracts ciliate; annual............--.-....--.-.------+--- 2. G. ciliata. 
Pubescence mostly or all appressed; leaves ciliate only at the 
base or not at all; bracts canescent, not ciliate; annuals or 
perennials. 
Annuals; leaves linear or linear-lanceolate. 
Leaves linear, often involute; heads 7 to 10 mm. 
broad......-...----2-- 2222222 eee eee eee eee ee eee 3. G. annua. 
Leaves lance-linear or oblong-linear, flat; heads about 
12 mm. broad........-..-.------------ 2-22 ee eee 4. G. longifolia. 
Perennials; leaves narrowly lanceolate or mostly broader. 
Leaves lanceolate to Hneat-oblong, several times as 
long as broad............-.-- ---+------+ 5. G. multiflora. 
Leaves elliptic-ovate to ovate or elliptic, less than 
twice as long as broad..........-.-------------- 6. G. brevifolia. 
C 
