4Qg COMPOSURE. Tetradpnia. 



inch to barely half an inch long), the wool persistent : heads corymbosely clustered. 

 — Deless. Ic. iv, t. 60. 



Dry hills and plains ; from Mono Lake, &c. {Brciccr) through Nevada to tlie interior of Oregon 

 and Idaho, and, in the var. ineriuis {T. iiicriiiis, Kutt., whicli has shorter leaves and heads) east- 

 ward to New Mexico, Colorado, and Wyoming. Heads in the larger-leaved form about three 

 (juarters of an inch long ; in the other sometimes only half an inch. Lobes of the corolla nearly 

 linear, the mid-nerve or axis commonly carinate-thickened from the apex downward. Tips of the 

 style-branches usually nearly as figured in the plate cited, or the base of the cone distinctly his- 

 pid, but occasionally the cone is more prominent, acute, and hispid with a few stiff bristles. In 

 such specimens, and also in some others, the ovaries are perfectly glabrous ; in others, the akenes 

 become glabrous. 



3. T. glabrata, Ton. & Gray. A foot or two high, unarmed, cottony-toiuentose 

 with very white but more deciduous wool : leaves rather fleshy, becoming glabrous 

 in age ; the primary ones linear-subulate and conspicuously mucronate (half an inch 

 long), erect or appressed on the branches of the season ; those of the fascicles shorter 

 and^ obtuse: heads corymbose. — Pacif. E. Rep. ii. 122, t. 5; Eaton in Bot. King 

 Exp. 193. 



Eastern side of the Sien-a Nevada on the borders of the State, Bcckirith, Andcrsm, Lcmmon. 

 Thence through the desert to Salt Lake. Heads and flowers nearly as in the precednig. Style- 

 hranches tipped with a very short and obtuse cone. Akenes seemingly always densely villous. 



T. NuTTALLii, Torr. & Gray, the spiny species of this section, apparently has not been met 

 with west of Utah or Idaho. 



§ 3. Early glahmte, unarmed : leaves all reduced to subulate green scales ; those at 

 the summit of the hranchlets passing into the scales of the 15 - IS-Jtoivered 

 campanulate involucre, tvhich thus becomes imbricated! — Lepidosparton, Gray. 



4. T. squamata, Gray. Paniculately branched, 3 or 4 feet high : branches 

 .slender : leaves reduced to very small thick and rigid-pointed scales : heads ra- 

 cemose or paniculate : involucre glabrous, of 8 to 12 inner scales in 2 or more series 

 and subtended by several or numerous shorter bracts : lobes of the corolla linear- 

 lanceolate : style-branches with acute and minutely hairy tips : akenes rather short, 

 completely glabrous. — Proc. Am. Acad. ix. 207. Linosyris s<iuamata, Gray, 1. c. 

 viii. 290. . ^ , ^ , 



Var. Breweri, Ck-ay, 1. c. Branches slender and rush- like, minutely and remotely 

 scaly : involucre subtended by few bracts. — Carphephorus junceus, Durand, PI. 

 Heerm. in Pacif. E. Eep. v. 8, not of Benth. 



Low hills and caiions, Sien-a Santa Monica, towards the sea. Brewer Tejon Pass ffeermann. 

 The above is the var. Bren^cri. The var. Palmeri is of the Colorado desert m Arizona (JJr. 

 Palmer) : it has more rigid branchlets, rather closely beset with thickish green scales, those of tlie 

 pedicels thinner, imbricated and passing into those of the involucre, which thus appears to be 

 many-ranked ; and the pappus is very copious. Head in both forms about 4 lines long. Although 

 quite glabrous, the vestiges of wool in the axils, at least in var. Palmcri, show that the plant 

 may have been white-cottony at first. 



99. LUINA, Benth. 

 Head about 10-flowered, homogamous; the flowers all tubular and perfect. Invo- 

 lucre campanulate, of 10 or 12 linear-lanceolate dry and rather rigid carinate-one- 

 nerved equal scales, shorter than the flowers. Eeceptacle flat. Corollas with a 

 slender tube and a tubular-funnelform ,5-lobed limb; its lobes ovate-lanceolate, 

 spreading, Avith mid-nerves more or less evident and extending down the throat. 

 Anthers soon exserted, linear, minutely and mucronately sagittate at base. Style- 

 branches linear-semiterete, minutely papillose-pubernlent externally, very obtuse, 

 totally destitute of appendage. Akenes terete, obscurely 10-striate, glabrous, or 

 with a few scattered fine hairs. Pappus of copious soft and white scabrous capil- 

 lary bristles. — A cottony- woolly low herb ; with simple stems from a stout woody 



