520 MINNESOTA BOTANICAL STUDIES. 



polygamous ; filaments slender ; anthers linear : akenes flattened, 

 strongly nerved, style persistent. Morelos, south of Mexico 

 City (f). 



T. Galeottii LEC. 1. c. 24: 131. t. 2.f. 6. 1885. 



Rather tall and simple, glabrous, 2-3-pinnate ; stipules 

 ample ; leaflets small, thin, ovate to obovate, toothed or lobed 

 above, glabrous: panicles rather leafy; flowers small, whitish, 

 monoecious or polygamous ; sepals slightly dentate ; anthers 

 linear, somewhat obtuse: pistils 5 to n : akenes nearly sessile, 

 compressed, glabrous, semi-ovate, veined, widely spreading ; 

 styles long, slender, withering. September-October. Moun- 

 tains of central Vera Cruz (f). 



T. Hernandezii TAUSCH. in Presl. Reg. Haenk. 2 : 69. 1835. 



Stem 3-5 feet high ; glandulous, leafy, branching ; leaves 

 2 to 3 times 5-parted ; leaflets large, often subsessile, variable in 

 outline, usually oval, 3-lobed or sharp toothed above ; under 

 side glandular: flowers in a conical panicle, monoecious or 

 polygamous ; sepals 4, greenish ; anthers linear, mucronate : 

 akenes 5-7, sessile or stipitate, obliquely ovate, compressed? 

 spreading, irregularly ribbed and protuberiferous ; styles long, 

 slender, somewhat persistent. June-August. Southeastern 

 Mexico, Oaxaca, etc. Lee. 2.f. 2 (f). 



T. gibbosum LEG. 1. c. 24: 132. t. 2.f. 7. 1885. 



Tall, erect, simple, or branched, glabrous : leaves 2 to 3 times 

 pinnate, petiole stipuled ; leaflets small, thin, oval, stalked, 3 

 sharp teeth above, often other small ones : panicles slightly 

 leafy: flowers monoecious or polygamous, small, greenish; 

 sepals feebly dentate ; anthers linear, usually blunt ; pistils 4-5 : 

 akenes stalked, flattened, tapering above and below, glabrous, 

 strongly ribbed, reticulated and provided with protuberances, 

 widely spreading ; style long and slender, withering. Sept.- 

 Oct. Mountains of western Oaxaca (f). 



T. lanatum LEG. in Bull. Soc. Roy. Bot. Belg. 16 : 226. 



1877. 



Rather tall and leafy, hispid : leaves 2 to 3 times pinnate, very 

 short petioled or sessile ; leaflets variable in size and form, often 

 orbicular or obovate, cordate or rounded at base, firm, glandular- 

 hispid beneath, short-stalked, tridentate at summit, often with 



