408 COMPOSITE. Tetradymia. 



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. (Brewer) through Nevada to the interior of Oregon 

 and Idaho, and, in the var. inerrtds (T. inermis, Nutt., which has shorter leaves and heads) east- 

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

 quarters 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, Torr. & Gray. A foot or two high, unarmed, cottony-tomentose 

 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. R Eep. ii. 122, t. 5; Eaton in Bot. King 

 Exp. 193. 



Eastern side of the Sierra Nevada on the borders of the State, Beckwith, Anderson, Lemmon. 

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

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



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

 with west of Utah or Idaho. 



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

 the summit of the branchlets passing into the scales of the 15 IS-Jlowered 

 campanulate involucre, which 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 1 2 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 squamdta, Gray, 1. c. 

 viii. 290. 



Var. Breweri, Gray, 1. c. Brandies slender and rush- like, minutely and remotely 

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

 Heerm. in Pacif. R. Rep. v. 8, not of Benth. 



Low hills and canons, Sierra Santa Monica, towards the sea, Brewer. Tejon Pass, Hecrmann. 

 The above is the var. Breweri. The var. Palmcri is of the Colorado desert in Arizona (Dr. 

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

 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. Receptacle flat. Corollas with a 

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

 spreading, with 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-puberulent 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 



