SOUTHPlRN CALIFORNIA ACADEMY OF SCIENCES 67 



TRILLIUM GIGANTEUM. . (H. & A.) 



Trillium sessile vai-. g-iganteura, H. & A. Bot. Beechv, 402. 

 1841. 



Trillium sessile vmi-. angustipetalum. . Torr. Pac. R. R. Rep. 

 4: 151. 1857. 



Trillium sessile vai-. chloropetalum, Torr. 1. c. 



Trillium sessile var. Calif ornicum, Wats. Proc. Am. Acad. 

 14: 273. 1879. 



That the Califoriiian 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 Sonoma county on rich, moist banks. The original 

 of Hooker & Arnott was the purple flowered form, collected by 

 Douglas, probably near San Francisco. 



ALSINE GLUTINOSA, sp. nov. 



Stems rather weak but ascending, 2-4dm. 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 7cm. long, 2cm. wide ; flowers solitary in 

 the forks of the branches and in terminal two or three flowered 

 cymes with long internodes ; calyx about 4mm. 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 A. Jamesiana of the mountains of 

 Colorado, and passes for that species in California, but differs 

 in several particulars, notabl}^ 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. 



ARENARIA GREGARIA, sp. nov. 



Perennial, densely tufted, the parts above ground more or 

 less purplish, covered with glandular, spreading hairs; 



