184 TRANSACTIONS OF THE [mAY 5, 



the lower scabrous with minute pubescence on the strongly retic- 

 ulated venation ; stipules persistent, more than 1 cm. long, atten- 

 uate, acuminate ; bracts similar but fugacious ; panicle a foot or 

 more long, few-flowered, flowers 8 mm. long, their pedicles elon- 

 gating in fruit to 3 cm. and very slender ; calyx 2 mm. long, its 

 lobes acutish ; Joints of the pod rhombic, minutely canescent, 

 slightly raised in the calyx, resembling those of D. canescens, 

 to which species the plant appears to be most nearly related. 

 The only pod on the specimen examined consists of but three 

 joints. 



SopJiora affinis, Torr. & Gray. 



Hoffmanseggia strict a, Be nth. 



Parkinsonia aculeata, L. 



Cassia Roemeriana, Scheele. 



Cercis occidentalis, Torr. Possibly the C. reniformis, En- 

 gelm., which Dr. Watson reduces to a variety. 



Prosopis juliflora, DC. 



Mimosa Lindheinieri, Gray. 



Mimosa fragrans, Gray. 



Acacia Wrightii, Benth. 



Acacia Greggii, Gray. 



Lythrum alatiim, Pursh. 



Gaura coccinea, Nutt. 



Oenothera speciosa, Nutt. 



Cucnrbita frntidissitna, Kunth. 



Houstonia angustifolia, Michx. 



Melampodium cinereum, DC. 



Berlandiera lyrata, Benth. 



Zinnia pumila. Gray. 



Lepachys columnaris (Pursh.), Torr. & Gray,var. pulcherrima 

 (DC), Torr. & Gray. 



Zeomenia liispida (H. B. K.), Gray. 



Verbesina encelioides (Cav. ), Giay. 



Tlielysperma iongipes, Gray, 



Hymenopappus jiavescens, Gray. 



Helenium tenuifolium, Nutt. 



Helenium elegans, DC? 



Centaurea Americana, Nutt. 



Perezia nana, Gniv. 



Lygodesmia aphylla (Nutt.), DC. 



Pyrrhojmppus Carolmianus (Walt.), DC. 



Lobelia Cliffortiana, L., var. hrachypoda, Gray. 



Rhododendron yiudiflorum (L.), Torr. 



Philibertia undulata (Torr.), Gray. 



Asclepiodora decnmbens (Nutt.), Gray. 



Asclepias verticillata, L., var, subverticillata, Gray, 



