346 PROCEEDINGS OF THE AMERICAN ACADEMY 



eels (3 to 15 lines), solitary or in pairs in the axils; calyx appressed- 

 pubi'sccnt, half au inch long: pod nearly straight, an inch long. — In 

 sandy places about San Luis Potosi (802 Schaffner). It is also 191 

 and 193 Parry & Palmer, the former number representing the cleisto- 

 gamoiis form upon which Zuccarini founded the genus Mariia. In 

 tliis the flowers are nearly sessile, the petals wanting, and the calyx 

 very much reduced. 



Erythrina coralloides, DC. In mountains near San Luis 

 Potosi (96 Schaffner). Known as " Colorin." 



Apios tuberosa, Moench. At Sutherland Springs, Texas (2134). 



Galactia. brachystachys, Benth. At Saltillo, Coahuila (252). 



Galactia marginalis, Benth. At Corpus Christi Bay, Texas ; 

 scanty specimens. The tuberous roots are said to be much relished as 

 food. 



Canavalia villosa, Benth. In the Caracol Mountains, south of 

 Monclova (259). 



PiiASEOLUs ATROPURPUREUS, DC. In the mountains north of 

 Monclova (262). 



PiiASEOLUS DiVERSiFOLius, Pers. At Laredo, Texas (263). 



PiiASEOLUS RETUSUS, Benth. Near San Luis Potosi, in sandy 

 places (825 Schaffner) ; 185 Parry & Palmer. The root is described 

 as tuberous, and the stems prostrate, 15 to 20 feet long. 



PiiASEOLUS iiETEROPHYLLUS, Willd. lu the Same locality (811 

 Schaffner, in part) ; 187 Parry & Palmer. 



PiiASEOLUS (Drepanospron) polymorpiius. Stems from an 

 esculent tuberous root, 3 feet long or more, glabrous or nearly so : 

 leaves (usually ^ to 1 inch long, sometimes 2 or 3 inches long) has- 

 tately lobed (the lower rarely ovate), the terminal lobe from short- 

 triangular (or sometimes obsolete) to oblong or linear, acute, the 

 lateral short or elongated, obtuse or truncate or acute : peduncles ex- 

 ceeding the leaves, few-flowered : bracts small ; bractlets firm and 

 persistent, ovate, nerved, a little shorter than the calyx ; pedicels 1 or 

 2 lines long : petals greenish white, 3 or 4 lines long : pod 1 .V inches 

 long by 4 lines broad, 2-4-seeded. — About San Luis Potosi (811 

 Schaffner, mainly) ; also 186 and 188 Parry & Palmer. ]Much re- 

 sembling P.Jiliformis, Benth., which is an annual, with smaller calyx 

 and bractlets, and much smaller pods. It is similar also to P. Wrightii, 

 Gray, which has, however, very narrow thin and deciduous bractlets. 



PiiASEOLUS (Drepanospron) scabrellus, Benth. in herb. 

 Gray. Stem and petioles pubescent : stipules triangular ; leaves 1 to 

 li inches long, scabrous above, more or less hastate (or sometimes 



