Erigeron. composite. 179 



35. E. ceespitosum (Nult.) : dwarf, canescent with a close and short pubes- 

 cence ; stems numerous from a thickened caudex, csespitose, decumbent, 

 mostlj'^ simple and terminated by single heads ; leaves linear-oblong, rather 

 obtuse, entire ; the cauline sessile ; the radical clustered, oblanceolate or 

 spatulate-oblong; rays (white or pale rose-color), very numerous and some- 

 what in a double series, twice the length of the hirsute-tomentose involucre; 

 achenia hairy ; exterior pappus squamellate-setaceous, very distinct. — Nutt. ! 

 in trans. Amer. phil. soc. («. ser.) 7. p. 307. 



j3. grandiflorum : larger ; stems occasionally somewhat branched ; rays 

 more than twice the length of the involucre. — Diplopappus grandiflorus, 

 Hook. ! fi. Bor.-Am. 2. p. 21. 



Dry hills of the Platte, in the Rocky Mountains, and on the Colorado of 

 the West, Nuttall! (3. Plains of the Saskatchawan and prairies of the 

 Rocky Mountains, Drummond ! — Stems 3-5, or in (3. often 6-8 inches high. 

 Radical leaves in dense clusters, about 2 inches long, or in (3. larger, ob- 

 scurely 3-nerved ; the cauline i-1 inch long, obtuse or abruptly acute. 

 Scales of the involucre appressed, narrow, very acute, the exterior shorter, 

 the interior broader. — The head is about as large as a Daisy in Mr. Nuttall's 

 plant : in the specimens of Drummond, the heads, as well as the whole 

 plant, are larger, and the rays longer. Mr. Nuttall has overlooked the ex- 

 terior pappus ; the squamellate seta3 of which, although not numerous, are as 

 large and distinct as in any species of this section. 



X Species unlaiown to us. 



36. £. (Pseuderigeron) canescens: canescently pubescent ; leaves linear- 

 lanceolate, entire, very much narrowed at the base ; the lower on long 

 petioles ; stem simple, corymbose ; the branches elongated, leafy, bearing 

 single heads ; scales of the involucre narrow, very acute, hirsute-scabrous. 

 Hook. — Diplopappus canescens, Hook. fl. Bor.-Am. 2. p. 21. 



Saskatchawan, between Carlton House and Edmonton House, Dnmimond! 

 — According to Hooker, this plant may possibly prove to be a variety of his 

 Diplopappus grandiflorus, which is a large variety of E. cajspitosum, Nutt. ; 

 but it is said to be a talier, more erect, and corymbose plant, with smaller 

 heads. 



37. E. lonchophyllum (Hook.) : stem tall, simple, hispid ; leaves very 

 long, linear, glabrous, nerved, ciliate ; the lower ones lincar-spatulate; ra- 

 ceme terminal, leafy, many-flowered ; peduncles elongated, somewhat leafy 

 (foliolosis) ; rays nuinerous, narrow (white?), scarcely longer than the 

 copious pappus. Hook.Jl. Bor.-Am. 2.j?. 18. 



Saskatchawan, Drummond. — Apparently a remarkable species, founded 

 on a single specimen, said to be about 2 feet high, very hispid with spreading 

 and rigid white hairs ; the cauline leaves several of them 6 inches long and 

 2-4 lines broad; the heads similar to those of E. glabellum : but in the 

 specific character the rays are said to be scarcely longer than the pappus. 



38. E. hispidum (Nutt.) : stem erect, corymbose, above scabrous and his- 

 pid ; leaves entire, ciliate and scabrous on the margin ; the radical spatulate ; 

 cauline sessile, acuminate ; peduncles elongated, one-flowered ; scales of the 

 involucre hoary, hispid, very hirsute, much acuminated ; rays very nume- 

 rous. Nutt. in trans. Amer. phil. soc. {n. ser.) 7. p. 310, not of DC. 



"St. Barbara, California. — Nearly allied to E. speciosum, from which, 

 however, it is very distinguishable by its exceedingly hirsute involucrum, 

 and hispid, naked, elongated peduncles ; the leaves appear, also, broader, 

 and scabrous towards the points. Rays blue, more nunjerous than in E. 

 speciosum, and not so long. Pappus double in ray and disk; rays [bristles] 

 20 to 24, persistent." Nutt. — We have not seen this plant. There is proba- 

 bly a typographical error in the character ; the word ' hispid ' should proba- 



