36 CARYOPHYLLACE^. (PINK FAMILY.) 



8. A. biflora, var. carnosula, Watson. Steins creeping; branches 

 mostly 1-flowered : leaves narrowly linear, nerveless : sepals linear, very obtuse, 

 cucullate at the summit: petals much louger than the sepals and capsule. — 

 Bibl. Index, i. 94. A. alpina of the Fl. Colorado. Colorado. 



Var. obtUSa, Watson. Leaves obtuse, carinate, serrulate-ciliate, obscurely 

 3-nerved: pednnclts glandular-pubescent: petals about half longer than the 

 oblong sepals. — Watson, 1. c. A. arctica of Hayd. Eep. for 1870-72, and 

 A. arciica, var. obtnsa, of Bot. King's Exp. and Fl. Colorado. Abundant iu 

 the mountains of Colorado, the Uintas, about Yellowstone Lake, and north 

 ward throughout the Arctic regions. 



9. A. Strieta, Watson. Leaves subulate-triquetrous, rather obtuse, scarcely 

 equalling the Jlua-er or exceeding the calyx, mostly shorter than the interuodes, 

 with manifest lateral nerves : peduncles 1 -flowered : petals sometimes wanting. 

 — Watson, 1. c. Alsine strieta, Wahl. A. Bossii of Hayd. Rep. 1870 and Fl. 

 Colorado. A. strieta, Michx., of the Eastern Flora, becomes A. Michauxii, 

 Hook. Colorado, Wyoming, and northward. 



§ 3. Parts of the fioiver sometimes in fours: valves of the capsxde bifid: young 

 ovary ^-celled: seed appendaged at the hilum with a small caruncle. — 



MCEHRINGIA. 



10. A. lateriflora, L. Sparingly branched, erect, minutely pubescent : 

 leaves oral or oblong, obtuse: peduncles usually 2-flowered, soon becoming 

 lateral : sepals oblong, obtuse : petals exserled. — From Colorado to Alaska, 

 «,nd eastward across tlie continent. 



11. A. macrophylla, Hook. Stems ascending, mostly simple, puberu- 

 lent above : leaves 3 to 4 pairs, narrowly lanceolate, acute at each end, bright 

 green : flowers few on slender pedicels : sepals ovate-oblong, acuminate : petals 

 included. — From the Bitter Root Mountains to Washington and California; 

 also in New Mexico. 



6. SAGITTA, L. Pearlwort. 



Low green herbs, with subulate or filiform glabrous leaves, and small 

 terminal usually long-pedicelled flowers. 



1. S. decumbens, Torr. & Gray. Stems decumbent, ascending: leaves 

 somewhat secund, mucronate : peduncles mitch longer than the leaves : petals as long 

 as the sepals : stamens 5 to 10. — Including S. subulata, Torr. & Gray, of 

 Gray's Manual, where the species is credited to Wimmer. Rocky Mountains 

 and eastward. 



2. S. LinnSBi, Presl. Densely mafted and decumbent, an inch or two high: 

 leaves somewhat fascicled, pungent: flowers on long pedicels, at length nodding : 

 sepals exceeding the petals: stamens 10. — Spergula saginoides, L. From New 

 Mexico to Arctic America. 



3. S. nivalis, Lindb. Cespitose, stems very short, scarcely ^ inch high: 

 leaves mucronate : peduncles short, strict : sepals with membranous margins 

 scarcely eqmdling the petals. — Uinta Mountains, Waison. 



