1890.] NEW YORK ACADEMY OF SCIENCES. 183 



649 and is not that species. It is perhaps undescribed, but near 

 C. monantJiogynus. 



Note on sows Plants collected by Mr. Franh Tweedy in Tom 

 Greene Co., Texas, in 1879. 



Clematis Pitcheri, Torr. & Gray. 



Delpliiiiium azureum, Michx. 



Polygala verticiUata, L. 



Polygala alba, Nutt. 



Polygala puberula, Gray, fide S. Watson in litt. But I do 

 not see how the specimens can fairly be referred to this species. 

 The plant produces cleistogamous flowers, after the manner of 

 P. polygama, but on branches from the base of the stems, al- 

 though not subterranean. The pods from these are not more 

 than half the size of those of P. iniberula. 



Krameria lanceolata, Torr. 



Abut Hon parvulum, Gray. 



CalUrrhoe pedata. Gray. A small flowered form. 



Callirrhoe involucrata (Nutt.), Gray, var. palmata (Buckl.) 

 (C. PALMATA, Buckl. Proc. Phila. Acad. 1861, 449.) 



Tribulus maxhnus, L. 



Thamnosma Texanum (Gray), Torr. 



Zizyphus obtusifolia, Gray. 



Ceanothus ovatus, Desf. 



Vitis ru2Jestris. Scheele. 



Vitis liej)tapliijlla (Buckl.), Britt. 



Sapindus marghiatus, Willd. 



Rhus radicans, L. The name has priority of place over E. 

 Toxicodendron of the same author and claims adoption, as the 

 two supposed species are quite inseparable. 



Phus Canadensis, Marsh. Arb. Amer. 129 (1785) ; {P. aro- 

 matica, Ait. Hort. Kew. i. 367 (1799). 



Dalea nana, Torr. 



Dalea formosa, Torr. 



Dalea lasiatha, Gray. 



Dalea laxijiora, Pursh. 



Astragalus Mexicanus, A. DC. ? 



Desmodium Tvveedyi, n. sp. Intermediate in appearance 

 between D. canescens (L.), DC, and D. illinoense, Gray. Stems 

 stout, ascending, three feet or more high, channeled and ridged, 

 at least in drying, minutely scabrous-pubescent ; leaves large, 

 petiole stout, 8 cm. long ; leaflets ovate, 9 cm. long, 5 cm. 

 broad just above the truncate base, the terminal one on a petio- 

 lule 3 cm. long, the lateral ones only about 3 mm.; leaflets all 

 obtuse and strongly mucronulate, the upper surface glabrate, 



