412 POLEMONIACEAE 



distinctly longer than the calyx, lobes 6-8 mm. long, obovate, rounded at apex; style 4-7 mm. 

 long. 



Dry slopes and ridges. Arid Transition and Canadian Zones; east of the Cascades from Grant and Spo- 

 kane Counties, Washington, to the Wallowa Mountains, Oregon. Type locality: "N.W. America: common on 

 the limestone range of the Blue Mountains [Oregon], and on the Rocky Mountains, near the confines of snow." 

 April-June. 



Phlox Douglasii subsp. rigida (Benth.) Wherry, Proc. Acad. Phila. 90: 137. 1938. (Phlox rtaida Benth. 

 in A.DC. Prod. 9: 306. 1845; P. caespitosa var. rigida A. Gray, Proc. Amer. Acad. 8: 254. 1870.) Plants lower 

 and compactly cespitose, 3-8 cm. high; leaves more rigid and pungent, mostly 4—6 mm. long, glaucous-green. 

 Dry ridges and sagebrush plains. Arid Transition Zone; east of the Cascades, from Crook County, Oregon, to 

 Modoc County, California, east to Idaho and Nevada. Type locality: Blue Mountains, Oregon. Collected by 

 Douglas. 



Phlox Douglasii subsp. Hendersonii (E. Nels.) Wherry, Proc. Acad. Phila. 90: 137. 1938. {Phlox 

 condcnsata var. Hendersonii E. Nels. Rev. W.N. Amer. Phloxes 14, 1899.) More dwarfed, mostly 2.5-4 cm. 

 high; leaves appressed, 2-5 mrn. long; calyx 5-8 mm. long. Alpine summits of the Cascades, southern Wash- 

 ington and Oregon. Type locality: Mount Adams, Washington. 



9. Phlox caespitosa Nutt. Clustered Phlox. Fig. 3919. 



Phlox caespitosa Nutt. Journ. Acad. Phila. 7: 41. 1834. 



Phlox Douglasii var. caespitosa H. L. Mason ex Jepson, Man. Fl. PI. Calif. 786. 1925. 



Low, densely cespitose with slender branches, 5-12 cm. high. Leaves rather broadly linear, 

 6-10 mm. long, 3-ribbed, the grooves between the midrib and inrolled margin relatively broad, 

 somewhat abruptly pungent, glaucous-green, minutely puberulent with glandless and gland- 

 tipped hairs, strongly villous, especially on the margins ; flowers usually solitary at the ends 

 of the branchlets, subsessile ; calyx 8 mm. long, the teeth subulate, a little narrower than the 

 leaves, prominently ribbed, the membranous intervals below narrow; corolla lilac to white, tube 

 12-15 mm. long, slender, lobes broadly obovate, 5-6 mm. long; style about 3 mm. long. 



Rocky gravelly ridges and slopes. Boreal Zones; near the summit of the Wallowa Mountains, northeastern 

 Oregon, east to Montana, Colorado, and New Mexico. Type locality: "Flat-Head River, on the ridges of dry 

 hills," Montana. May-Aug. 



10. Phlox Covillei E. Nels. Coville's Phlox. Fig. 3920. 



Phlox Covillei E. Nels. Rev. W.N. Amer. Phloxes 15. 1899. 

 Phlox caespitosa var. Covillei Brand, Pflanzenreich 4-'": 84. 1907. 

 Phlox Douglasii var. Covillei Jepson, Fl. Calif. 3: 140. 1943. 



Caudex woody, depressed-cespitose and cushion-like. Leaves appressed or ascending on the 

 slender_ seasonal branches, narrowly linear, abruptly narrowed at the apiculate apex, 3-5 mm. 

 long, ciliate on the thickened rib-like margins, the surface sparsely and minutely glandular- 

 pubescent, lower surface rather broadly grooved between the thickened midrib and the margins ; 

 flowers usually solitary and sessile at the ends of the branches ; calyx 5-6 mm. long, glandular- 

 puberulent, the lobes very similar to the leaves, about as long or distinctly shorter than the tube, 

 their prominent midribs extending down the tube ; corolla white to pale pink, tube 8^10 mm. 

 long, hairy at the base within, lobes broadly obovate to suborbicular, 4 mm. long; style about 

 2 mm. long. 



Rocky ridges and slopes. Arid Transition and Canadian Zones; eastern slopes of the central and southern 

 Sierra Nevada and White Mountains, California. Type locality: "Black Caiion, White Mountains, Mono Co., 

 California." July-Sept. 



11. Phlox diffusa Benth. Spreading Phlox. Fig. 3921. 



Phlox diffusa Benth. PI. Hartw. 325. 1849. 



Phlox Douglasii var. diffusa A. Gray, Proc. Amer. Acad. 8: 254. 1870. 



Phlox Peckii Wherry, Proc. Acad. Phila. 90: 140. 1938. 



Plant freely branching from a stout woody base, the branches woody, spreading or prostrate, 

 1-3 dm. long, rather thinly tomentose to glabrate. Leaves narrowly linear to linear-subulate, 

 only moderately rigid and pungent. 10-15 mm. long; flowers usually solitary, terminating short 

 leafybranches; pedicels 1-4 mm. long; calyx 8-10 mm. long, rather thinly villous, lobes about 

 equaling or shorter than the tube; corolla pink, lilac or sometimes white; tube 10-13 mm. long; 

 lobes broadly obovate to obovate-spatulate, 6-7 mm. long; style 3-5 mm. long. 



Dry slopes and open pine forests. Arid Transition and Canadian Zones; southern Cascades and Siskiyou 

 Mountains, Oregon, south in the Sierra Nevada to southern California. Type locality: "prope Bear Valley in 

 montibus Sacramento," California. May-Aug. 



Phlox diffusa subsp. longistylis Wherry, Proc. Acad. Phila. 90: 139. fig. 2. 1938. Differs principally 

 m the longer (6-10 mm.) styles; whole plant and flowers usually smaller. Mainly Canadian Zone; Olympic 

 Mountains, Washington, and the Cascades from southern British Columbia to Lane County, Oregon. Tvpe 

 locality: "south slope of Mt. Adams, Yakima County, Washington." 



Phlox diffusa subsp. subcarinata Wherry, Journ. Wash. Acad. 29: 517. fig. 1. 1939. Leaves stiffer, 

 pale glaucous-green, at least the upper villous-tomentose; membranous sinuses of the calyx usually subcarinate. 

 conspicuously villous-tomentose. Eastern base of the Cascades Washington, and Oregon, east to the northern 

 slopes of the Sierra Nevada and the mountains of southern California. Type locality: Mount Rose, Washoe 

 County, Nevada. 



Phlox diffusa subsp. scleranthifolia (Rydb.) Wherry, Notulae Naturae No. 87: 13. 1941. (.Phlox 

 scleranthtfoha Rydb. Mem. N.Y. Bot. Gard. 1: 313. 1900.) Plants prostrate and loosely branched to compact, 

 herbage glabrous to puberulent or rarely sparsely villous-tomentose; leaves very narrowly subulate, stiff and 

 pungent, frequently turned upward. Southeastern Oregon to Montana and South Dakota. Type locality: Hot 

 Springs, Black Hills, South Dakota. 



