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, hardlv 

 2 lines long. Guatemala (f). 



T. pubigerum BENTH. PI. 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 monoecious 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. i: 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 ROSE, 1. 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 (f). 



T. grandiflorum ROSE, 1. c. 188. 1899. 



T. grandifolium ROSE, 1. c. 143. 1897. Not Wats. 

 Stems 5 to 8 feet high, glabrous : leaves i to 2 feet long, 4 to 5 

 times ternate ; main petiole short with long dilating stipules ; 

 leaflets stalked, large, nearly orbicular, i 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, 



