Davis: THALICTRUMS OF NORTII AMERICA. 517 
Allied to 7. déotcum which it closely resembles ; but it is more 
robust, taller: leaves glandular-puberulent: akenes long, slen- 
der, thin-walled, 2-edged, ribbed, not furrowed. Introduced 
1881. 
T. Fendleri ENGLEm. ex Grayin Mem. Am. Acad. 4:5. 1849. 
A variable species: plants 1 to 3 feet high, rather stout and 
leafy: leaves 4 to 5 times pinnatifid, upper stem leaves sessile ; 
leaflets rather firm, ovate to orbicular, usually with many shal- 
low rounded or acuminate lobes, bases variable: flowers diceci- 
ous, in rather compact panicles; stamens many, anthers long: 
akenes nearly sessile, obliquely ovate, flattened, 3 to 4 ribs on 
each face. July-Aug. Western Texas to Montana. Intro- 
euced 168r. \Lec.2./f. 9. 
Var. Wrightii TRELEASE, |. c. 304. 1886. 
T. Wrightit Gray Pl. Wright 2: 7. 1852. 
The upper leaves petioled; leaflets smaller, puberulent be- 
low: akenes plump, sigmoid, reticulated. Aug.—Sept. Dry 
regions. New Mexico, southern Arizona into Chihuahua. 
ioc. 2. f. 3. 
Var. platycarpum TRELEASE, I. c. 304. 1886. 
T. platycarpum GREENE, Pitt. 1: 166. 1888. 
T. hesperitum GREENE, Pitt. 2: 24. 18809. 
Inflorescence sparsely glandular-puberulent: leaflets like the 
type: akenes flat, erect, dilated, the veins mostly longitudinal. 
Central and southern California. 
T. polycarpum Warson, Proc. Am. Acad. 14: 288. 1879. 
I. Fendleri var. polycarpum Torr. Pac. R. Rep. 4: 61. 
1853. 
I. Fendlert Brew. & Wars. Bot. Calif. 1: 4. 1876. In 
part. 
TI. cestum GREENE, FI. Francis, 309. 1892. 
Allied to 7. Fendler?: glabrous throughout: leaflets long- 
petioled: flowers dicecious in rather close panicles: akenes 
larger in a dense globose head, stalked, obovoid, turgid taper- 
ing into reflexed styles. Summer. Sandy streams, California 
to Columbia river. Introduced 1881. Lec. 3. f 4. 
7. peltatum DC. Prod. 1: 11. 1824. 
Plant tall, glabrous or glaucous: upper stem leaves twice 
ternate: leaflets pale, 3 inches across, orbicular, mostly peltate, 
