Davis: THALICTRUMS OF NORTH AMERICA. 519 
T. Guatemalense Rose & C. DC., Contr. Natl. Herb. 5: 188. 
1899. 
Stems about 2 feet high; slender, branched, somewhat hairy : 
leaves 4 to 5 times ternate; leaflets small, ovate, peltate, some- 
what roughened, strongly veined below: akenes turgid, hardly 
2 lines long. Guatemala (f). 
T. pubigerum Bentu. Pl. Hartw. 285. 1839-57. 
Plant rather tall, nearly simple, glabrous or pubescent, finely 
striated ; leaves 2 to 4 times pinnate; leaflets distant, their stalks 
stipuled, often ovate, sometimes subpeltate, cordate or roundish 
at base; summit 3-toothed, often with other smaller teeth: 
flowers moncecious or polygamous, reddish; anthers linear, 
mucronate: akenes stipitate, glabrous, flattened, obliquely 
ovate, reticulately veined, protuberiferous, reflexed; style with- 
ering. Summer. West central Vera Cruz (f). 
T. longistylum DC. Syst. 1: 171. 1818. 
Plant tall, sparsely pubescent even to the fruits: leaflets 
roundly lobed and toothed outwardly, pubescent beneath: flow- 
ers perfect, anthers slender, pointed: fruits flattened a little, 
reticulately ribbed, straight along one side; styles slender, 
longer than the body before becoming broken. August. Moist 
banks, Sierra de las Cruces, Mexico, 10,000 feet. Also South 
America (f). 
T. Pachucense Ross, |. c. 188. 1899. 
Delicate glabrous plant, 8 to 12 inches high; roots fibrous: 
leaves only 3 to 4 inches long, mostly basal, 3 times ternate ; 
leaflets 2 to 4 lines long, broad or narrow, bases variable : flowers 
perfect, on erect pedicels which become bent in fruit; sepals 
purplish; anthers narrow, apiculate: ovaries oblong; style long 
and slender. Open woods. High altitudes. Southern Hi- 
dalgo (tf). 
T. grandiflorum Rose, |. c. 188. 1899. 
T. grandifolium Rose, |. c. 143. 1897. Not Wats. 
Stems 5 to 8 feet high, glabrous: leaves 1 to 2 feet long, 4 to5 
times ternate; main petiole short with long dilating stipules; 
leaflets stalked, large, nearly orbicular, 1 to 2 inches across, often 
cordate at the base, 3 to 7 roundish lobes, sometimes a little 
hairy on under veins: flowers in a large, nearly naked panicle, 
