488 CARYOPHYLLACEAE 



Petals longer than the sepals; common -species. 



Leaves filiform 10. A. douglasii. 



Leaves lanceolate, broad at base 11. A. calif ornica. 



Petals shorter than sepals or none; northern border, rare 12. A. pusilla. 



High altitudes or alpine; leaves subulate or filiform, rather rigid, mostly pungent; sepals 

 acute or pungent. 



Cyme strict, 1 to 4-flowered 13. A. propinqua. 



Cyme more or less spreading, several to many-flowered 14. A. nuttallii. 



SECTION 1. Moehringia. Seeds with a strophiole ; capsule valves 2-cleft. 



1. A. macrophylla Hook. Perennial, with running rootstocks ; stems ascend- 

 ing or erect, puberulent, 2 to 4 inches high; leaves in 3 to 5 pairs, lanceolate 

 or linear-lanceolate, acute at each end, % to l 1 /^ inches long; peduncles slen- 

 der, terminal or becoming axillary, 1 to 5-flowered; sepals ovate, acute or 

 acuminate, 1 to 2 lines long, exceeding the petals ; capsule ovoid, nearly equal- 

 ing or a little exceeding the calyx. 



Shady slopes in the mountains, often on mossy rocks, 1600 to 4000 feet : 

 Southern California north through the Coast Ranges and Sierra Nevada to 

 Siskiyou Co. North to British Columbia. May. 



Locs. Coast Eanges: Stonewall Mine, Cuiamaca Mts., Parish 4532; Mt. Hamilton, Jepson 

 4203; Mt. Day, Santa Clara Co., E. J. Smith; Grizzly Peak, Blasdale ; Bell Springs, n. Men- 

 docino, Davy 5352; Kneeland Prairie, Tracy 2631; Hupa, Mary Manning; Shackleford Creek, 

 w. Siskiyou, Butler. Sierra Nevada: Plumas Co. (ace. Bot. Gal. 1: 70); Sequoia Mills (now 

 Millwood), T. Brandegee; Colony Mill, Sequoia Park, Jepson 663. 



Eefs. ARENABIA MACROPHYLLA Hook. Fl. Bor. Am. 1: 102, t. 37 (1830), type loc. Strait of 

 Juan de Fuca, Scouler; Jepson, Fl. W. Mid. Cal. 168 (1901). 



SECTION 2. Euarenaria. Seeds without a strophiole ; capsule valves 2-toothed 



or -cleft. 



2. A..saxosa Gray. Stems slender, spreading or decumbent at base, arising 

 from a branching root-crown, 5 to 12 inches high; herbage green, glabrous or 

 retrorsely puberulent; leaves oblanceolate to linear, mucronate, 5 to 10 lines 

 long; flowers in a paniculate cyme, more or less leafy bracteate; sepals nar- 

 rowly ovate, sharply acute, iy 2 lines long, the petals almost or quite equaling 

 them. 



Southern California east to the Rocky Mts. 



Loc. Santa Ana Canon, San Bernardino Mts., 8200 ft., Hall 7672; only known station in 

 Cal. 



Eefs. ARENARIA SAXOSA Gray, PI. Wright. 2: 18 (1853), type loc. New Mexico, Wright 

 865; Hall, Zoe, 5: 264 (1908). 



3. A. serpyllifolia L. Stems several from the base, retrorsely puberulent, 

 3 to 9 inches high ; leaves ovate, acute, 1 to 2 lines long ; flowers loosely cymose- 

 paniculate, on pedicels 2 to 4 lines long; calyx-lobes ovate-lanceolate, his- 

 pidulose on back, 1% lines long, twice as long as the petals ; capsule ovate, 

 equaling the calyx. 



Naturalized from Europe. Stream beds, Humboldt Co. and north to Wash- 

 ington. 



Locs. Willow Creek, Trinity Eiver, Tracy in 1911; Humboldt Co., on Klamath Biver, 

 Chandler in 1901. 



Eef. ARENABIA SERPYLLIFOLIA L. Sp. PI. 423 (1753), type European. 



4. A. compacta Cov. Flowering stems short (y 2 to 2 inches high), scantily 

 leafy, glandular-puberulent, rising little above the much-branched crown of a 

 perennial taproot; crown cushion-like, densely leafy, 1 to 2 inches broad; 

 leaves linear, thickish, minutely glandular and minutely denticulate, 1 to 2 

 lines long; flowers solitary in the axils or terminal, on pubescent pedicels 2 

 to 3 lines long ; sepals l 1 /^ to 2 lines long, shorter than the petals. 



High montane, Sierra Nevada from Yosemite Park south, 9000 to 11,600 feet. 

 Locs. Mt. Dana, Jepson 3313; Big Cottonwood Mdws., near Mt. Whitney (ace. Coville). 



