STANDLEY FLORA OF GLACIER PARK. 397 



3. PHLOX L. Phlox. 



Low matted perennials; leaves narrow, entire; flowers white or bluish, with a 

 Blender tube, mostly solitary and sessile at the ends of the branches. — The various 

 kinds of cultivated phlox belong to this genus. 

 Leaves awl-shaped, less than 2 mm. wide, with cobwebby hairs; corolla 8 to 10 mm. 



long 1. P. hoodii. 



Leaves linear or oblong, 2 to 4 mm. wide, without cobwebby hairs except sometimes 



at the base; corolla 15 to 18 mm. long 2. P. alyssifolia. 



1. Phlox hoodii Richards. Dry exposed rocky slopes near the foot of Lake 

 McDermott and on shale slides at east entrance. Yukon to Wyo. and Nebr. — 

 Plants 5 cm. high or less; leaves 4 to 10 mm. long; corolla white, the tube scarcely 

 longer than the calyx. 



The plants flower in spring. 



2. Phlox alyssifolia Greene. Occasional on the east slope at low altitudes, on dry 

 rocky slopes. Mont, to Utah, Colo., and S. Dak.— Plants 3 to 6 cm. high; leaves 5 

 to 15 mm. long, acute; corolla bluish white, the tube longer than the calyx. 



This, too, blooms in spring, but, as in P. hoodii, the shriveled corollas often persist 

 in fruit. 



4. COLLOMIA Nutt. 



1. Collomia linearis Nutt. Occasional at low and middle altitudes, on open 

 slopes, in woods, or on gravel beds along streams. B. C. to Calif., N. Mex., and 

 Minn.— Annual, 10 to 30 cm. high, simple or with few branches, finely hairy; leaves 

 linear-lanceolate, 2 to 5 cm. long, the upper ones broader and often pale at the base; 

 flowers in dense leafy clusters at the ends of the stems; corolla trumpet-shaped, about 

 1 cm. long, pinkish. 



The flowers are inconspicuous and unattractive. 



5. MICROSTERIS Greene. 



1. Microsteris gracilis (Dougl.) Greene. Occasional at low or sometimes at middle 

 altitudes, on dry open slopes. B. C. to Calif., Colo., andMont. {Giliagracilis Hook.) — 

 Branched annual, 10 to 40 cm. high, with fine gland-tipped hairs, at leastabove; leaves 

 mostly linear, 2 to 6 cm. long; flowers in the leaf axils; corolla 8 to 12 mm. long, 

 piu-plish, almost tubular. 



6. LINANTHTJS Benth. 



1. Linanthus harknessii (Curran) Greene. East entrance, in fields, Umbach. 

 B. C. to Calif., Colo., and Mont. (Gilia harlnessii Curran.) — Very slender glabrous 

 annual, 5 to 25 cm. high, branched; leaves 3 or 5-lobed to the base, the lobes narrowly 

 linear; corolla white, 3 to 4 mm. long. 



74. HYDROPHYLIACEAE. Waterleaf Family. 



Annual or perennial herbs; leaves alternate or opposite, without stipules; flowers 

 mostly in 1-sided racemes or cymes, sometimes solitary in the axils; calyx of 5 united 

 sepals; corolla 5-lobed; fruit a 1 or 2-celled capsule. 

 Plants glabrous; leaves kidney-shaped, 1 to 3 cm. broad, with 5 to 9 short rounded 



lobes 1. EOMANZOFFIA. 



Plants conspicuously hairy; leaves various but never kidney-shaped, pinnately lobed 

 or sometimes entire. 

 Stamens shorter than the corolla and included in it; plants annual; flowers solitary. 



2. NEMOPHILA. 



