CoUnmia. POLEMONIACE^R. 487 



Sinrra Nevada, from Mariposa Co. to Sliasta, at 5,000 to 10,000 fpot, thcnco far nortluvard and 

 eastward ; on tlio westward slope mainly the var. diffiosa. A varialilc sjwcics. 



4. P. caespitosa, Nutt. Forming dense and cusliion-like tufts 3 or 4 inches 

 liigh: leaves short (2 to 5 lines long), from acerose-subulate to oblongdinear, rigid, 

 erect or ascending and usually imbricated, completely covering the short stems, their 

 edges ciliate with short bristly hairs, otherwise glabrous : flowers as in the preced- 

 ing but smaller. — Jour. Acad. Philad. vii. t. 6. 



Higlior Sierra Nevada : on Silver Mountain at 11,000 feet {Brc.vrr), the var. r.nndc.iuiala ; a 

 very compaet, Hmall-lcaved and small-flowiMed form, which lias been (lonfoundod with /'. Jloodii, 

 The species, in several forms, extends eastward to the llocky Jlountains. 



+- •+- Leaves hoary with soft pubescence or cohwebbij wool : flowers white. 



5. P. canescens, Torr. & Gray. Forming broad and mostly compact mats, a 

 few inches high, gray or whitened by tlio woolly pubescence : leaves acerose or slen- 

 der-subulate, ascending or somewhat spreading, rather rigid, 3 to 5 lines long : tube 

 of the corolla longer than the calyx ; the lobes obovate, entire or emarginate. — 

 Pacif. R Rep. ii. 8, t. 6. 



Eastern aide of the Sierra Nevada on the borders of the State (Bloomer, JVaismi), and through 

 the interior country to Utah and Wyoming. 



P. MuscoiDES and P. bryoides, Nutt., are smaller species, in dense moss-like tufts, with the 

 downy leaves compactly imbricated in four ranks, natives of the interior and llocky Mountains. 



2. COLLOMIA, Nutt. 



Calyx 5-cleft. Corolla aalvorform or tubular-funnolform ; tho throat commonly 

 enlarged. Stamens usually more or loss oxsertod, witli slender filamonts, unequally 

 inserted in or beneath tho throat of the corolla. Ovules and seeds solitary or several 

 in each cell. Seod-coat simple, when wotted producing coj)ioiis mucilage (whence 

 the generic name), which is usually filled with long uncoiling spiral threads. — 

 Chiefly annuals (North American, and one or two extra-^tropical South American), 

 mostly glandular-viscid ; witli alternate leaves, or tlio lower opposite, cither entire, 

 incised, or pinnately compound : flowers cymose-clustored or panicled, or scattered. 



§ 1. Corolla salverform, or with the throat or upper part of t/ie tube somewliat en- 

 larged : seeds solitanj in each cell, or 2 or 3 in the last species. 

 * Leaves simple and sessile, entire, or the lower occasionalli/ few-toothed or laicised. 

 -t- Calyx-tube obconical or top-shaped : leaves all but the lowest altem.ate. 



1. C. grandiflora, Dougl. Erect, a foot or two high, rather stout: leaves 

 linear, oblong-lanceolate, or the uppermost almost ovate (2 or 3 inches long) : flowers 

 capitate-crowded at the summit and in the upper axils : calyx-lobes obtuse : corolla 



bulfor salnum-color (an inch long and tho oblong lobes 4 lines long), showy 



Lin.U. Pot. Keg. t. 1174 : Hook. Hot. Mag. t. 2894. 



Sierra Nevada and higher foot-hills, from San Diego Co. uorthward ; thence to OrcRon and the 

 llocky Mountains. 



2. C. linearis, Nutt. More branched, and when old spreading, a span to a foot 

 or more in height : lower leaves linear, upper lanceolate : flowers capitate-crowded 

 as in the foregoing, but smaller : calyx-lolies triangular-lanceolate and very acute : 

 corolla yoilowish-whito or brownish-purple, slender, half an inch long or less; tho 

 oval lobes about a line long. —Gen. i. 12G ; Lindl. Pot. Peg., t. 1166 : Hook. Bot. 

 Mag. t. 2893. 



Var. subulata, Gray. Difl'usely muf;h branched, a span or so in height, more 

 viscid : leaves acute : flowers fewer in the clusters, and some scattered or nearly 



