CATALOGUE OF SPECIES. 71 



''The plant is of especial interest because it is evidently a local alpine species 

 derived not from the circumpolar Armaria bi flora and A. arctica, but from some local 

 species of a lower zone, similar to A. fendleri. Its sepals distinguish it at once from 

 the circumpolar plants mentioned above, in which these organs are thin, striate, 

 and obtuse. In habit, however, it closely resembles them, having attained the 

 depressed, matted, shrubby form so protective to plants at high altitudes." 



Mr. Koch collected specimens at timber-line in the vicinity of Dutcher's camp, 

 Big Cottonwood Meadows, not more than 15 kilometers from the type locality (No. 

 2119.) 



Arenaria congesta Nutt. in Torr. &. Gr. Fl. i. 178 (1838). Typo locality, "shady 

 hills in Rocky Mountain range, about Hear River of the Lake of Timpanagos." 



Near Mineral King, Sierra Nevada (No. 1501). In our specimens the stems are 

 viscid-glandular in their middle portions, but above and below they are glabrous. 

 The pedicels of the umbelloid inflorescence are about 5 mm. long. 



Arenaria congesta subcongesta Wats. Bot. King Surv. 40 (1871), as A.fendleri 

 subcongesta; Wats. Hot. Cal. i. 69 (1876). Type locality, "East Humboldt Mountains, 

 Nevada; 7-9,000 feet altitude." 



Grapevine Mountains (No. 1761). Our plant is 10 to 20 cm. high and has leaves 1 to 

 2 cm. long, glandular-viscid stemu, small but not congested cymes, and sepals gla- 

 brous, acute, scarious-margined, and with a narrow, green, 1- to 3-ncrved midrib. It 

 is evidently the plant called A. capillaris in Flora Franciscana and a portion of that 

 called by the same name in the Botany of California. I have designated it by the 

 name used above because, although not glabrous, the plant is often referred to that 

 variety, and the original description might bo stretched to include it. A. capillaris 

 of Poiret 1 is, according to the description, a tall plant glabrous throughout, with the 

 lower leaves 2 inches long, and with obtuse sepals. Its type locality is Siberia. A. 

 nardifolia of Hooker 2 , which lias been referred by Kegel to A. capillaris as a variety, 

 show8both in specimens from ISritish Columbia and from Oregon, as well as in Hooker's 

 descript ion and figure, th at tin; plant is easily distiii guished from A. congesta, A. fendleri, 

 A. macradenia, etc., in its broad, very obtuse, scarcely scarious-margined sepals. 

 Those species have sharply acute sepals. The plant called A. formosa in the Botany 

 of the King Survey, which was referred to A. capillaris in the Botany of California, 

 in external appearance exactly resembles A. macradenia, and has not the obtuse 

 sepals of A. capillaris and its variety nardifolia. The glandular protuberances at 

 the base of the stamens are not clear, however. It appears, therefore, that A. capil- 

 laris is represented in North America only by its variety nardifolia, a northwestern 

 plant extending as far south as Oregon, and that the more southern plants with 

 acute sepals, commonly referred to A. capillaris belong to A. macradenia and to A. 

 congesta subcongesta as the latter is now understood. 



Arenaria macradenia Wats. Proc. Amer. Acad. xvii. 367 (1882). Type locality, 

 "near the Mohave River, and in the mountains bordering the Mohave Desert," Cali- 

 fornia. 



In duplicates of the type specimen of this species (Palmer, No. 41, 1876), there is 

 in the filaments opposite the. sepals, on each side of the base, a gland or blunt tooth, 

 and in the other number referred to the species by l)r. Watson (Parish Brothers, No. 

 1329, 1882), these glands, although present, are very rudimentary. In our No. 830 

 the glands are developed into lacerate scales reaching a length of 2 mm., and in- 

 serted on the margin and the back of the base of the filament. The capsule equals or 

 exceeds the calyx. The species may be distinguished from A. fendleri by its broad, 

 oblong-ovate, smooth, green, scarious-margined sepals striate when dry. In A. 

 fendleri the sepals are lanceolate, and the green portion is confined to a narrow, 

 glandular-pubescent, usually keeled midrib. 



'Cycl. vi. 380 (1804). S F1. Bor. Amer. i. 98 (1830). 



