V. PLANTS WRIGHTIANiE. 117 



setosis (raro 3 - 4-setosis) et uniaristatis. — Prairies at the Pass of the Limpia ; Aug. 

 — Stem much branched from the base, a span high, leafy, the branches somewhat 

 fastigiate. Leaves an inch or less in length, not rigid, perfectly glabrous ; the lobes 

 two to four lines long, not setigerous or pointed, filiform, as well as the rhachis. 

 Peduncles about an inch long. Involucre two lines long. Rays about 10, oblong. 

 Palete of the pappus all similar, except that about five of them are smaller, and one 

 or two often reduced to a subulate or setaceous rudiment. The capillary awn of 

 the larger ones is a little shorter than the disk-corolla ; the lateral setiform lobes 

 are as slender, but about one third the length of the awn, sometimes rather longer, 

 when there are occasionally two minute teeth below them. This and H. tenuifo- 

 Hum induce me to refer AciphyllaBa acerosa to Hymenatherum. — Mixed with this 

 in the distribution Avere some specimens of Lowellia aurea, q. v. p. 118. 



361. H. PENTACH^TUM (DC.! Prodr. 5. p. 64:2) '. caulibus sufi'ruticulosis csespi- 

 tosis depressis ; ramis abbreviatis conferte foliosis pedunculos solitarios elongatos 

 parce setaceo-bracteolatos gerentibus ; foliis cinereo-puberulis glabratisve pinnati- 

 partitis, lobis 5-9 acerosis rigidis ; involucro campanulato fere ebracteato ; pappo 

 e paleis 5 brevibus obovato-oblongis obtusis truncatisve muticis, et 5 iis alternis 

 majoribus oblongo-lanceolatis in aristam breve coroUam disci adtequantem productis, 

 lobis lateralibus brevissimis subulatis aut subnullis. — Gray, PI. Fendl. p. 90, adnot. 

 Hills of the San Pedro River ; Aug. — De Candolle overlooked the five unawned 

 palese of the pappus, which exist in all specimens, requiring therefore a modifica- 

 tion of the character, if, as I prefer, we retain this name instead of H. Berlandieri, 

 DC, which is only a more glabrate and slender variety of the same species. Rarely 

 I find one or two of the larger paleas scarcely awned, or replaced by a truncate 

 palea. The awn is usually about the length of the palea that bears it. 



362. H. PENTACH.^TUM, DC, var. foliis glabellis nitidulis ; pedvmculis graciliori- 

 bus. H. Berlandieri, Z) C. .' /. c. — On the Rio Frio and Rio Grande, Texas. — The 

 involucre is rather more turbinate in this more slender variety. This is just the 

 same as one of the specimens of De Candolle's H. Berlandieri : the other (of which 

 the corresponding specimens in Hooker's herbarium are marked as gathered between 

 Laredo and Bexar, therefore in Texas) is merely a still smoother and more slender 

 state of the species, viz. : — 



363. H. PENTACH^TUM, DC, var. graciliore, foliis nitidulis fere glabris. H. Ber- 

 landieri, DC. I. c. — Western borders of Texas. 



364. H. Hartwegi : caulibus vix sufFruticulosis erectis laxe ramosis ; pedunculis 

 gracilibus nudis fastigiato-subcorymbosis ; foliis glabellis pinnatipartitis, lobis 3-5 

 filiformi-acerosis rigidulis ; involucro campanulato fere ebracteato ; pappo e paleis 

 5 obovatis muticis et 5 alternis duplo longioribus oblongis in aristam corollam disci 

 subsequantem productis, lobis lateralibus brevissimis acutis. — H. Berlandieri, Benth. 

 PI. Hartw. p. 18, non DC. Hills near El Paso, Sept. — The stems and branches are 

 more sparsely leafy, the peduncles more numerous and clustered, and the lobes of 

 the leaves fewer, and proportionally longer, than in H. pentachi3etum. In Hart- 

 weg's plant, the small heads are narrow, the involucre scarcely above a line in 



VOL. III. ART. 5. — 16. 



