Plantae novae Californiae mediae occidentalis. 61 
y 3, Trillium giganteum (H. & A.) Heller, l. c., p. 67. 
Trillium sessile var. giganteum H. & A., Bot. Beechy, 402, 1841. 
Trillium sessile var. angustipetalum Torr., Pao, R.R. Rep., IV, 151. 1857. 
Trillium sessile Var. chloropetalum Torr., |. c. 
Trillium sessile var. californicum Wats., Proc. Am. Acad., XIV,273. 1879, 
That the California plant is distinct from T. sessile of the Atlantic 
seaboard is evident, but whether its various forms, founded on the color 
and shape of the flower segments, are worthy of distinctive names is 
doubtful, for plants with both mottled and unmottled leaves, as well as 
perianth segments of different shapes and color may be found growing 
in close proximity. The writer has seen only purple and white flowered 
forms, but in the dried state the delicate flowers of some of the white 
- ones have assumed a greenish tinge. No. 5035. It is common in So- 
noma county on rich, moist banks. The original of Hooker & Arnott 
was the purple flowered form, collected by Douglas, probably near San 
Francisco. 
1" 4. Alsine glutinosa Heller, l. c., p. 67. 
Stems rather weak but ascending, 2—4 dm high, loosely branched 
throughout, the branches slender, divaricate, viscid pubescent; leaves 
sessile with a clasping base, varying from narrowly lanceolate below to 
ovate-lanceolate in the middle and upper portion, all more or less acuminate, 
sparingly short hairy and cilate, the largest 7 cm long, 2 cm wide; flowers 
solitary in the forks of the branches and in terminal two or three flowered 
cymes with long internodes; calyx about 4 mm long, glandular, or the 
lobes nearly glabrous, these oblong or lance-oblong, barely acute; petals 
ovate-spatulate, nearly twice as long as the calyx, notched; stamens 10, 
anthers brownish; styles 3. 
No. 5880, collected in grassy woods near Summit Lake, Mt. Sanhedrin, 
Lake county, July 15, 1902. 
This species is related to 4. Jamesiana of the mountains of Colorado, 
and passes for that species in California, but differs in several particulars, 
notably in the shape of the petals. These are “oblong . . . cleft about 
one-third their length, the lobes oblong and obtuse.” It has a leaf with 
"margin glandularly pubescent”, which is not the case in our species. 
p 9 Arenaria gregaria Heller, l. c., p. 67. 
Perennial, densely tufted, the parts obove ground more or less 
purplish, covered with glandular, spreading hairs; rootstocks somewhat 
lignescent, frequently 2—3 dm long; stems 1 dm high or less, the older 
ones slender and dichotomously branched above, the younger ones stouter; 
leaves 3—7 mm long, fascicled and oblong on the young shoots; on the 
older branches lanceolate, acute, opposite; sepals 4—5 mm long, lanceo- 
late, acuminate, 3-veined, the midvein especially prominent; petals white, 
slightly exceeding the calyx. 
No. 5892, collected on open, stony slopes near Summit Lake, Mt, 
Sanhedrin, Lake county, July 15. 1902. It is abundant, growing in 
