phlox POLEMONIACE.E 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. caespitosa 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. Donglasii Hook. Fl. 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 

 3-4 lines 1 >ng. Eastern Oregon and Washington to Brit. Columbia and 

 Nebraska. 



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. PI. 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 

 crenulate obovate lobes 4-5 lines long. On the high mountains, California 

 to Alaska. 



* * Loosely tufted, or many-stemmed from a merely 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 inches high: leaves very narrowly linear, 1-2 inches long by less 

 than aline 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 corolla longer than the calyx; the obovate-cuneate lobes 



