530 RANUNCULACEAE 



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



Plants, 49. 



Befs. — Thalictrum .^lpin'UM L. Sp. PI. 1:54.3 (17.53), type European; Gov. Contrib. U. S. 

 Nat. Herb. 4:5.5 (1893). 



2. T. sparsiflorum Turcz. Stems erect, slender, 2 to 2i/2 feet high ; tlowers 

 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, 2V2 Hues long, I14. to IV2 lines wide, strongly oblique (half-obovate), 

 with the dorsal angle sti'aight, the sides with 3 or 4 veins curving upward and 

 inward from the base and more or less branching above. 



Iligli mountains, 5000 to D500 feet: San Bernardino Mts. and Sierra Nevada. 

 East to the Rocky Mts., north to Ala.ska. Asia. 



Loes. — Mt. San Gorgoiiio, Geo. B. Grant; Poison Meailow, Tulare Co., Jcpson 1126; Pine 

 Eidge, Fresno Co., Hall ^- Chandler 142; upper San Joaquin River, Madera Co., Cmigdon; 

 Truekee, Heller 7056; Pine Ci-eek, Lassen Co., Bal-er 4- Nutting. 



Ref. — Th.\lictrum 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. 



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

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



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

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

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

 Jepson 710. 



Rpfs. — Tn.\LicTRUM 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. platiicarpum Trel. Proc. Post. Soc. Nat. Hist. 23:304 (1883), based 

 ou California material ; not T. platycarpuni 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. 



Loes. — Van Duzen River Valley, Trao)/ 2679; Ross Valley, Marin Co., Jepson; Berkeley, 

 Jepson; Niles, Jepson: Crystal Springs Lake, C. F. Baker 692; Nacimiento River, Jepson 

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

 Jepson. 1503(1 ; San Diego, Ahranis 3423. 



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

 with an.'istomosing veins. — Central and northern Sierra Nevada foothills and lower altituiles. 

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

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

 Oak opens). 



Befs. — Thalictrum polycarpu.m Wats. Proc. Am. Acad. 14:288 (1879^; Jepson, Fl. W. 

 Mid. Cal. 202 (1901). T. fendleri Engt-lm. var. .'polyciirpum Torr. Pac. R. Rep. 4:61 (1857). 

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

 Range. T. mendocinum Greene, I.e., type loc. Round Valle}-, Cha.snut; achenes nearly veinless. 

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



