VOL. II. | Flora of Colorado. 231 
clustered, oval or obovate, entire, 3-5 nerved, 2-4 cm. long, on 
margined petioles exceeding their own length. Scapose peduncles 
12-20 cm. long. Heads deflexed in fruit. 
Collected May 17, 1891, on Orchard Mesa, Grand Junction, Colo- 
rado, in gravelly soil, which was being continually washed down from 
the ridges above. 
62. THELESPERMA SUBNUDUM Gray. Pueblo and Grand Junc- 
tion. 
63. BAHIA NUDICAULIS Gray. Grand Junction, on the Gunni- 
son mesa. 
64. CHANACTIS STEVIOIDES Hook. & Arn. Grand Junction. 
65. CHAZNACTIS SCAPOSA. Czspitose, stem 6-8 cm. high, 
branching underground from a perennial, woody root; whole plant 
hirsute-canescent; leaves all radical, simple, from oblong to orbicu- 
lar, 8-12 mm. long on petioles equaling them or twice as long; blade 
coriaceous, acute or obtuse, entire or crenate; margins revolute; 
lower surface densely covered with appressed white hairs; upper 
surface impressed-punctate and sparingly hirsute: heads 15 mm. 
high and broad: involucral scales linear-oblong, obtuse, about 12 
arranged in two series, densely pubescent externally, glabrous and 
marked by prominent nerves within; the inner series longer with 
reddish scarious margined tips: lobes of flesh-colored corolla equal: 
stamens included: style tips broad: akenes clavate, densely villous; 
pappus of eight nearly equal, hyaline scales one-half the length of 
the akene, with prominent midrib and erose tips. 
This was found May 17, 1891, growing on the mesa across the 
Gunnison River, near Grand Junction, Colorado. It grew in sandy, 
washed places, and seemed disposed to form mats. It differs from 
typical Chzenactis chiefly in the simple leaves, prominent midvein 
of the pala, and scapose inflorescence. It might perhaps repre- 
_ sent a new genus, but it seems better to regard it as an aberrant 
species of Chzenactis. The punctate leaves separate it clearly from 
any form of Bahia. 
66. TETRADYMIA SPINOSA Hook. & Arn. Grand Junction and 
- Mancos. : 
67. MALAcoTHrRIx Torreyi Gray. Grand Junction. 
_ 68. LyYGODESMIA GRANDIFLORA T. & G. Mancos, Grand 
- Junction, Glenwood Springs. 
