CARYOPHYLLACEAE (PINK FAMILY) 187 



9. Arenaria uintahensis A. Nels. Bull. Torr. Bot. Club 26: 7. 1899. Caes- 

 pitose, with subligneous multicipital caudex, nearly glabrous throughout: 

 leaves mostly basal, narrowly linear, acerose, 10-25 mm. long: stems slender, 

 erect, 10-15 cm. high, glabrous or obscurely glandular-puberulent above: cyme 

 open, subpaniculate : sepals ovate or narrower, nerveless, scarious, keeled by 

 the broad green midrib: petals oblong, obtuse, 5 mm. long, longer than the 

 sepals. Western Wyoming, Utah, probably Colorado and Idaho. 



10. Arenaria Hookeri Nutt. T. & G. Fl. 1: 178. 1838. The multicipital 

 caudex forming broad mats surmounting the woody root: stems 3-12 cm. 

 high, glandular-puberulent: leaves linear-subulate, rigid and pungent, 2-4 cm. 

 long: cymes short and dense, the scarious bracts conspicuous: sepals rigid, 

 pungent, 5-7 mm. long, exceeded by the oblong petals. (A. pinetorum A. Nels. 

 Bull. Torr. Bot. Club 26: 350. 1899.) Common on bleak hilltops in our range. 



11. Arenaria Fendleri Gray, PL Fendl. 13. 1848. Pale and somewhat 

 glaucous, more or less glandular-pubescent, especially above: stems numerous, 

 erect, leafy, closely aggregated upon the summit of a thick root: basal leaves 

 setaceous-gramineous, either ciliolate or smooth, 4-8 cm. long, somewhat 

 pungent ; the cauline gradually shorter, sheathing at base : inflorescence dichot- 

 omous, few-many-flowered: the glandular sepals attenuate, but little shorter 

 than the obovate white or ochroleucous petals: capsule shorter than the 

 sepals. (A. Eastwoodiae Rydb. Bull. Torr. Bot. Club 31: 406. 1904.) New 

 Mexico to Wyoming, and westward. 



9. MOEHRINGIA L. 



Low slender perennials with thin oblong or ovate-lanceolate leaves and 

 small white flowers axillary or in terminal cymes. Parts of the flower some- 

 times in fours. Valves of the capsule bifid. Young ovary 3-celled. Seed 

 with a light-colored spongy appendage at the hilum. 



1. Moehringia lateriflora (L.) Fenzl. Verbr. Alsin. Table, p. 18. 1835. 

 Glabrate or puberulent : stems erect, sparingly branched: leaves ovate to ob- 

 long, obtuse, 1-2 cm. long: peduncles usually 2-flowered, soon becoming lat- 

 eral: petals white, entire or nearly so, longer than the oblong sepals: capsule 

 twice as long as calyx, opening by three 2-cleft valves. Arenaria lateriflora. 

 Moist shaded places; Colorado, northward and across the continent. 



10. SPERGULARIA J. & C. PRESL. 



Somewhat fleshy-leaved annuals or perennials of wet saline soils, with 

 white or purplish solitary-axillary or terminal cymose flowers. Sepals 5. Pet- 

 als 5. Stamens 10. Styles 3; ovary 1-celled, with 3 valves. 



1. Spergularia sparsiflora (Greene) A. Nels. A glandular-hifsutulous an- 

 nual, freely branched, erect, or with lax spreading stems, diffuse, slender, 

 the lower internodes longer, the upper rather shorter than the narrowly linear 

 acute leaves: stipules thin, very short, broadly ovate and acutish, varying 

 to obtuse and truncate: flowers mostly solitary, one to each pair of leaves, on 

 slender pedicels shorter than the leaves: petals small, lilac: capsule ovate, 

 obtusish, exceeding the sepals: seeds minute, red-brown. Tissa sparsiflora 

 Greene, Erythea 3: 46. 1905. Not infrequent in wet strongly saline places; 

 Wyoming and Colorado. 



11. PARONYCHIA Adans. WHITLOWWORT 



Tufted herbs, with lignescent base, opposite leaves, and dry, silvery stipules. 

 Flowers small, apetalous, and scarious-bracted. Sepals 5, linear-oblong, 

 concave and awned at the apex. Stamens 5, sometimes alternating with 

 linear staminodia. Ovary ovoid, narrowed into the 2-cleft style. 



Flowers terminal, solitary or subcymose and sessile. 



Leaves oblong, obtuse 1. P. pulvmata. 



Leaves linear-subulate 2. P. sessilifoh*. 



