PHLOX POLEMONIACE 451 
* Densely cespitose and depressed, mostly forming cushion-like 
evergreen mats or tufts: the short leaves crowded up to the solitary and 
sessile or short-peduncled flower: ovules solitary in each cell. 
+ Leaves subulate or acerose, somewhat rigid, more or less beset or 
ciliate with cobweb-like or woolly hairs: plants forming broad mats 2-4 
inches high. ° 
P. Hoodii Richards. Frankl. Journ. Appx .t. 28. Sparsely or loosely 
lanate, becoming glabrate: leaves subulate, rather rigid, erect, somewha 
' loosely imbricated: tube of the corolla not exceeding the calyx; its lobes ob- 
ovate, entire, 2-3 lines long. Sandy plains and hillsides, Wyoming and 
perhaps Idaho to Nebraska and the Saskatchewan. 
+ + Leaves rigid, 4-6 lines long, destitute of woolly or cobwebby 
hairs, the margins naked, or ciliate with rigid or rather soft hairs: plants 
either densely or loosely tufted. 
P. cespitosa Nutt. Journ, Acad.. Philad. vii, 41, t. 6, fig.1. Stem 
tufted, 2-4 inches high: leaves linear,-subulate or oblong-linear, commonly 
much crowded, hispid-ciliate, otherwise glabrous or with some short glandu- 
lar-tipped rigid hairs: corolla with tube somewhat longer than the calyx; it 
obovate entire lobes 3 lines long. On the highest mountains, Oregon to Cali- 
fornia and the Rocky Mountains. 
P. Douglasii Hook. FI. ii, 73, t. 158. Stems rather slender, ascending or 
erect, 2-8 inches-long, rather loosely tufted: leaves acerose to linear-subulate, 
pubescent to nearly glabrous, often ciliate near the base, 3-6 lines long, loosely 
imbricated, sometimes spreading, usually fascicled at the nodes: flowers sessile 
or short-peduncled, 6-8 lines long: calyx pubescent; its subulate lobes as long 
as the tube; corolla with tube longer than the calyx, and obovate entire lobes 
as long. Eastern Oregon and Washington to Brit. Columbia and 
ebraska. 
Var andicola Britton Mem. Torr. Club, v, 269. Leaves longer, 8-12 
lines long, less fascicled at the nodes. Range of the type. 
P. diffusa Benth. Pl. Hartw. 325. P. Douglasii var. diffusa Gray. 
Depressed and diffusely branched, forming mats 6-18 inches in diameter: 
leaves linear or acerose, 6-12 lines long, very acute sometimes ciliate near the 
base with woolly hairs: flowers usually sessile: calyx loosely tomentose, the 
broad-subulate lobes longer than the campanulate tube: corolla pink or pur- 
ple to white; with a broad tube longer than the calyx, and entire or obscurely 
laptop obovate lobes 4-5 lines long. On the high mountains, California 
aska. 
* * Loosely tufted, or many-stemmed from amerely woody-persistent 
base, or wholly herbaceous, with linear or lanceolate or rarely ovate 
spreading leaves which are little if at all fascicled in the axils: flowers 
slender-peduncled, solitary or somewhat cymose, 
+ Calyx-tube between the strong ribs scarious, inclined to be 
membranaceous and more or less replicate, forming intervening angles; 
the narrowly-subulate and mostly rigid teeth shorter than the tube of the 
corolla: style long and slender, often equalling the tube of the corolla. 
P. linearifolia Gray Proc Am. Acad. viii, 255, Glabrous, some- 
times minutely hirsute above, corymbosely much branched from a woody 
base, 6-10 incies high: leaves very narrowly linear, 1-2 inches lung by less 
than a line wide: tube of the calyx saliently 5-angled from the base by the 
strong replication of the white-membranaceous sinuses; the lobes nearly 
acerose: tube of the coroila longer than the calyx; the obovate-cuneate lobes 
