244 CARYOPHYLLACE^. Arenaria. 



brevifolia, Chapm. Fl. 49. — On rocks, Georgia, Tatnall Co., Niittall, Stone Mountain, Canby, 

 Gray, Small ; fl. April, May. Apparently the most rare and local eastern species. 



* * * Terrestrial annuals of the Tatific Slope : sepals neither imiurated nor very strongly 



nerved. 



•1— Seeds much flattened and margined. 



A. Douglasii, Fexzl. Thinly glandular-])uhescent and somewhat viscid, or nearly gla- 

 hrous : stems much branched, 2 to 15 inches high: leaves attenuate to filiform points: pe- 

 duncles filiform : flowers numerous, larger than in the related species, 4 to 5 lines in diameter : 

 sepals ovate, thin-margined, obscurely or more or less distinctly ribbed : petals obovate, con- 

 spicuous : capsule subglobt)se ; valves rounded at tlie apex ; seeds large, smooth, or with 

 fine radiating striation, reniform, broadly margined. — Fenzl ace. to Torr. & Gray, Fl. i. 

 674; Durand, Fl. Pratt. 83; Brew. & Wats. Bot. Calif, i. 69; Greene, Fl. Francis. 124. A. 

 vermi, $, Hook. & Arn. Bot. Beech. 325. Grcniera DoikjUisH, Gay, Ann. Sci. Nat. ser. .3, 

 iv. 27. Alsine tenella, Torr. Bot. Mex. Bound. 36 (from char, and hah.). — Barren hillsides 

 and grassy slopes, S. Arizona, Palmer, and S. California to Oregon, Howell, Henderson ; fl. 

 May, June. Some smaller flowered specimens with seeds of A. Douglasii have been collected 

 by Thurher near San Diego, Calif. 



-4— -1— Seeds not flattened nor thin-margined. 



A. Ho"Wellii, Watson. Finely glandular-pubescent : stem terete, purple, profusely branched, 

 more tlian a foot high: leaves rather tliick, obtuse, 4 to 7 lines in length; the floral much 

 reduced : flowers 2^ to 3 lines in diameter : petals oi)]ong, little exceeding the ovate glandu- 

 lar nerveless sepals : capsule ovoid, pointed ; valves narrowed to an acutish apex ; seeds 

 dark, slightly tuberculate- crested. — Proc. Am. Acad. xx. 354. — Oregon, in the Coast 

 Mts., near Waldo, Th. Howell, June 5, 1884. 



A. Californica, Brewer. Smooth, with delicate filiform stems branching from the base, 

 erect, 2 to 4 inches in lieight: leaves very short, slightly fleshy, 1 to 2 lines in length, obtuse : 

 flowers 4 lines in diameter : petals oblong, about twice the length of the ovate-oblong nerve- 

 less or inconspicuously ribbed sepals: seeds small, flnely roughened. — Brewer in Boland. 

 Cat. 6; Brew. & Wats. Bot. Calif, i. 69 ; Greene, Fl. Francis. 124. A. brevifolia, var. (?) 

 Californicii, Gray, Proc. Calif. Acad. Sci. iii. 101. — Dry hills, sandy soil. Central California 

 to Grant's Pass, Oregon, Howell ; fl. March to May. 



A. pusilla, Watson. Smooth, very diminutive, 1^ to 2 inches high : stems purplish, fili- 

 form, branched from the base : leaves obtusish, only 1 to 2 lines in length : sepals not so 

 strongly nerved as in the preceding, 1 to 1:| lines in length: petals minute or wanting: 

 seeds minute, smooth. — Proc. Am. Acad. xvii. 367. A. Californica, Wats. Bot. Calif, ii. 

 435, not Brew. — Plains, N. California, about Yreka, Greene, to the Dalles of the Columbia, 

 Howell Bios. ; Washington, at White Salmon, Suksdorf and Pullman, Piper, wliere said to 

 be common along fences, etc. ; fl. April, May. This species bears the closest habital resem- 

 blance to A. capillipes, Boi.ss., of Spain, but lacks the minute pulverulence of that species. 



* * * * Annuals or slender-stemmed loosely matted perennials, 5 to 15 inches in height: 

 sepals lanceolate, acuminate or attenuate, strongly 3-5-nerved. 



■i— Puberulent, at least on the pedicels. 



A. tenella, Nutt. Finely glandular-pube.scent : stems very slender, dichotomously branched 

 almost from the base, 3 to 8 inches in height : leaves attenuate from a connate ])rominently 

 ribl)ed base to a filiform often curved apex, 3 to 5 lines long ; the uppermost considerably 

 reduced : pedicels filiform, several times as long as the strongly 3-ribbed sepals ; the latter 

 equalled or more or less exceeded by the oblong petals : valves of ovoid capsule exceeding 

 the sepals ; seeds small, margined with a fine muriculate crest (under a strong lens). — 

 Nutt. in Torr. & Gray, Fl. i. 179; Eaton & Wright, N. A. Bot. 133 (excl. Arkansas spec.) ; 

 Macoun, Bot. Gaz. xvi. 286 ; not Kit., which is wholly obscure. A. tenuifolia, var. Americana, 

 Fenzl in Torr. & Gray, Fl. i. 674. Greniera tenella. Gay, Ann. Sci. Nat. ser. 3, iv. 27. 

 Alsine tenella, Torr. Bot. Wilkes Exped. 243. — Rocky places, Oregon, Nuttall, Tolihie, Hall, 

 Howell, to Brit. Columbia, at Kandoops, ace. to J. M. Macoun, and Nanaimo, Miss Cooley; 

 fl. May to July. Like ^-l. Grmnlandira of the Eastern States, this species seems to occur 

 either in mats or in a segregated state. In the former condition it considerably resembles 



