CATALOGUE. 165 
THELESPERMA GRACILIS, Gray.—Erect, much branched above, smooth; 
leaves pinnately 5-7-parted, the divisions linear and somewhat rigid ; heads 
hemispherical, on peduncles 4—6’ long; outer series of involucral scales 
obtuse or acutish; inner series acutish, with margin slightly, if at all, 
scarious; raysnone. (‘‘Achenia oblong-linear, crowned with two stout sub- 
ulate persistent spreading retrorsely pectinate-hispid awns.’"—Porter and 
Coulter in Fl. Col. p. 72.)—Arizona, Loew. 
Cosmos* BIPINNATUS, Cav., var. PARVIFLORUS, Gray. (Cosmos parvi- 
fiorus, H. B. K.)—Annual, erect, 6-12’ high, glabrous, leafy ; leaves petioled 
bipinnately parted; segments narrowly linear or capillary; outer series 
of involucral scales lanceolate, acuminate, as long as or exceeding the 
inner, obtuse, and somewhat scarious-margined ones; outer achenia short, 
and the inner ones somewhat longer-beaked; awns variable in number, 
2—4.—Arizona (639) and New Mexico. 
Bivens TENuIsEcTA, Gray.—Annual, glabrous, branching from the base, 
leafy ; leaves bipinnately parted; segments entire (rarely again divided) and 
lanceolate ; scales of the involucre linear, hirsute, especially at base; rays 
(4-7) hardly exceeding the disk; “achenia attenuate-linear, glabrous sub- 
tetragonal”; awns nearly as long as the achenia and very strongly down- 
wardly barbed—Colorado, in the Arkansas Valley (544). 
Bivens renicuuirotia, DC.—Tall, branching, glabrous, or with the 
youngest branches puberulent; leaves 2-3 times pinnately divided; seg- 
ments entire or sometimes lobed; involucre with the outer scales linear, 
ciliate, and nearly as long as the inner ones, which are oval, with yellowish, 
scarious margins; rays large, 5-6, 8” long, oval, deep yellow, with plain, 
brown veins. Achenia (I have not seen) given by Dr. Gray in Pl. Wright. 
2, p. 90, as 24 lines long (the “var. acheniis minoribus”), and by DC. Prod. 
v, p. 603, as 3-34 lines long, and linear-tetragonal, hardly scabrous at the 
apex, 2-awned.—Sanoita Valley, Southern Arizona (671). 
BENS HETEROPHYLLA, Ort.? var.?—Erect, smooth; lower leaves 
petioled, pinnately “5-7-parted” ; segments distant, linear, entire, the terminal 
* Cosmos, Cav.—Differs from Thelesperma in the inner series of involucral scales not being connate 
to or above the middle and the rays being rose- or violet-colored, and from Bidens in the achenia being 
more or less rostrate at the apex. 
