Davis: THALICTRUMS OF NORTH AMERICA. 517 



Allied to T. dioicum 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 Gray in Mem. Am. Acad. 4:5. 1849. 



A variable species : plants i 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 dioeci- 

 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- 

 duced 1881. Lee. i.f. 9. 



Var. Wrightii TRELEASE, 1. c. 304. 1886. 



T. Wrightii GRAY PI. 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. 

 Lee. 2./. 8. 



Var. platycarpum TRELEASE, 1. c. 304. 1886. 

 T. plalycarpum GREENE, Pitt. 1 : 166. 1888. 

 T. hcspermm GREENE, Pitt. 2 : 24. 1889. 

 Inflorescence sparsely glandular-puberulent : leaflets like the 

 type: akenes flat, erect, dilated, the veins mostly longitudinal- 

 Central and southern California. 



T. polycarpum WATSON, Proc. Am. Acad. 14 : 288. 1879. 

 T. Fendleri var. polycarpum TORR. Pac. R. Rep. 4: 61. 



1853. 

 T. Fendleri BREW. & WATS. Bot. Calif. 1 : 4. 1876. In 



part. 

 T. ccestum GREENE, Fl. Francis, 309. 1892. 



Allied to T. Fendleri: glabrous throughout: leaflets long- 

 petioled : flowers dioecious 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. Lee. 3. f. 4. 



T. peltatum DC. Prod, i : n. 1824. 



Plant tall, glabrous or glaucous : upper stem leaves twice 

 ternate : leaflets pale, 3 inches across, orbicular, mostly peltate, 



