530 RANUNCULACEAE 



of the northern hemisphere south of the great glaciers. Avebury. Brit. Fl. 



Plants, 49. 



Eefs. THALICTRUM ALPINUM L. Sp. PI. 1:545 (1753), type European; Cov. Contrib. TL S. 

 Nat. Herb. 4:55 (1893). 



2. T. sparsiflorum Turcz. Stems erect, slender, 2 to 2y 2 feet high ; flowers 

 perfect, few in a narrow panicle; leaflets small (6 to 10 lines long) ; ovaries 

 densely and minutely glandular ; achenes very minutely glandular-dotted, shortly 

 stiped, 2 l / 2 lines long, 1*4 to l 1 /^ lines wide, strongly oblique (half-obovate), 

 with the dorsal angle straight, the sides with 3 or 4 veins curving upward and 

 inward from the base and more or less branching above. 



High mountains, 5000 to 9500 feet : San Bernardino Mts. and Sierra Nevada. 

 East to the Kocky Mts., north to Alaska. Asia. 



Locs. Mt. San Gorgonio, Geo. B. Grant; Poison Meadow, Tulare Co., Jepson 1126; Pine 

 Eidge, Fresno Co., Hall $ Chandler 142; upper San Joaquin Eiver, Madera Co., Congdon; 

 Truckee, Heller 7056; Pine Creek, Lassen Co., Baker $ Nutting. 



Eef. THALICTRUM SPARSIFLORUM Turcz.; F. & M. Ind. Sem. Petrop. 1:40 (1835), type 

 Asiatic. 



3. T. fendleri Engelm. Stems 2 to 3 feet high; herbage glabrous; leaflets 

 roundish, 5 to 8 lines long, incised or crenate, the teeth mostly rounded but 

 apiculate; panicle 3 to 6 inches long or with accessory panicles from the upper 

 axils ; sepals mostly white-scarious, elliptic to ovate, mostly obtuse ; achenes 2 to 

 3 lines long, 1 to 2 lines broad, irregularly oval in outline, more oblique ventrally, 

 the sides 3 or 4-nerved or -ribbed, the central nerve most prominent, the lateral 

 often branched, or merely with irregular branching nerves on the sides. 



Sierra Nevada and mountains of Southern California, mostly at higher alti- 

 tudes. East to New Mexico. The number, development, and branching of the 

 nerves on the sides of the achene is so variable that this character must be used 

 with caution. 



Loes. Golden Trout Creek, Tulare Co., Jepson 4933 ; Nellie Lake, Fresno Co., A. L. Grant 

 1078 ; Stubblefield Canon, Yosemite Park, Jepson 4539 ; Summit, Nevada Co., Jepson. 



Var. hesperium Jepson n. comb. Inflorescence and achenes very sparsely glandular- 

 puberulent; achenes flattened. California, range of the species and passing into it, perhaps 

 scarcely worth definition: Glen Alpine, Katharine Chandler; Eound Mdw., Giant Forest, 

 Jepson 710. 



Eefs. THALJCTRUM FENDLERI Engelm.; Gray, Mem. Am. Acad. 4:5 (1849), type'loc. Mora 

 Creek, New Mexico, Fendler. Var. HESPERIUM Jepson. T. hesperium Greene, Pitt. 2 : 24 

 (1889). T. fendleri var. platycarpum Trel. Proc. Bost. Soc. Nat. Hist. 23:304 (1883), based 

 on California material ; not T. platycarpum Hook. & Th. 



4. T. polycarpum Wats. Stems 2 to 3 (or 6) feet high; herbage glabrous 

 throughout ; leaflets rather prominently veined beneath ; sepals elliptic to ovate, 

 mostly acute ; achenes many, somewhat inflated, the sides marked with anasto- 

 mosing veins and mostly with a salient rib down the middle. 



Coast Ranges and Southern California, mostly of the foothills or of lower 

 altitudes. 



Locs. Van Duzen Eiver Valley, Tracy 2679; Boss Valley, Marin Co., Jepson; Berkeley, 

 Jepson; Niles, Jepson; Crystal Springs Lake, C. F. Baker 692; Naeimiento Eiver, Jepson 

 1696; Santa Maria, Ida M. Bloohman; Arroyo Seco, San Gabriel Mts., Peirson 53; Palomar, 

 Jepson 1503a; San Diego, Abravis 3423. 



Var. caesium Jepson n. comb. Glaucous throughout; achenes less turgid, the sides simply 

 with anastomosing veins. Central and northern Sierra Nevada foothills and loAver altitudes. 

 Perhaps better regarded as identical with the species, but in any event illustrated by the follow- 

 ing: near Chico, Greene; Calaveras Co. (aec. Greene) ; Hetch-Hetchy, Jepson 3643 (Black 

 Oak opens). 



Eefs. THALICTRUM POLYCARPUM Wats. Proc. Am. Acad. 14:288 (1879); Jepson, Fl. W. 

 Mid. Cal. 202 (1901). T. fendleri Engelm. var. fpolycarpum Torr. Pac. E. Eep. 4:61 (1857), 

 as to Napa Valley plants. T. ametrum Greene, Muhl. 5:129 (1909), type loc. seaward Coast 

 Eange. T. mendocinum Greene, I.e., type loc. Eound Valley, Chesnut ; achenes nearly veinless. 

 Ex. char. T. latiusculum Greene, I.e., 130, type loc. Mt. Sanhedrin, Heller 5855. T. magarum 



