PHLOX POLEMONIACEAE 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, somewhat 

 loosely imbricated : tube of the corolla not exceeding the calyx : its lobes 

 obovate, 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 gland- 

 ular-tipped rigid hairs : corolla with tube somewhat longer than the calyx : 

 its obovate entire lobes 3 lines long. On the highest mountains, Ore- 

 gon to California 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 shortrpeduncled, 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 long. 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 tomen- 

 tose, the broad-subulate lobes longer than the campanulate tube: corolla 

 pink or purple 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, Calfornia to Alaska. 



* * Loosely tufted, or many-stemmed from a merely woody-persist- 

 ent 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 an- 

 gles; 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, sometimes 

 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 

 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 corolla longer than the calyx ; the obovate cuneate 



