88 MISSOURI BOTANICAL GARDEN. 
The bean rust ( Uromyces Phaseoli Wint.) occurs in scat- 
tered brown spots on both sides of the leaves, at first very 
small but gradually enlarging, and as the spores mature the 
diseased area presents a blackish appearance. 
The Lima bean mildew ( Phytophthora Phaseoli Thaxter ) 
is of somewhat more rare occurrence but occasionally appears 
in widely separated localities. This disease attacks all parts 
of the plant in the form of a whitish covering, but most 
seriously and frequently affects the pods. 
KEY TO THE SPECIES OF PHASEOLUS. 
Seed less than j} in. long, or if longer much flattened and usually 
subreniform. 
Seed with conspicuous rays from the hilum to the dorsal suture, 
lunate or subreniform, much flattened except in one variety. 
Flowers small, greenish white. P. lunatus. 
Seed with inconspicuous or no rays, rarely lunate. Flowers of 
medium size, white or purplish violet. P. vulgaris. 
Seed more than § in. long, more or less tumid, less than twice as long 
as broad, not usually reniform. P. multiflorus. 
P, LUNATUS L. 
Phaseolus lunatus Linn. Sp. Pl. 724. (1753). —83: 1031. [ed. Willd.]. 
(1800). — Miller, Gard. Dict. (1807). — DC. Prodr. 2: 393. (1825). — 
Maycock, Fl. Barb. 293. (1830). — Benth. Fl. Bras. 1513 181. (1859). — 
Bailey, Cyclop. Am. Hort. 8: 1295. (1901). 
Phaseolus foecundus, P. saccharatus, Macfadyen, F1. Barb. 281, 282. (1837). 
Phaseoli magni laté albi. Lobel. Ic. Stirp. 2360. [¢. 70.] In part. (1591). 
Phaseoli Brasiliani VII, VIII, IX, X. Gerarde, Hist. Pi. 1041. (1597). 
Phaseolus peregrinus VII, VIII, IX, X, XI. Clus. Pl. Hist. 2 : 225. (1601). 
Phaseolus peregrinus angustifolius: an idem cum Smilace hortensi 
minore. Bauhin. Pinax 340. (1623). — Tournef. Inst. 418. (1719). 
Phaseolus peregrinus primo similis, fructu lato, albo, striato. Bauhin. 
Pinax 340. (1623).— Tournef. Inst. 413. (1719). 
Phaseolus peregrinus angustifolius alter, fructu ex albo & nigro vario. 
Bauhin. Pinax 340. (1623). — Tournef. Inst. 413. (1719). 
Phaseolus peregrinus foliis minoribus, fructu exalbido, nonnunquam 
variegato. Bauhin. Pinax 340. (1623).— Tournef. Inst. 413. (1719). 
Phasiolus latus albo ex nigro varius, angustifolius. Bauhin. Hist. Pl. 23 
268. (1651). 
Phasioli lati, candicantes virgulis nigricantibus notati secundum longi- 
tudinem, vel nigricantes: flore albo. Bauhin. Hist. Pl. 2: 268. (1651). 
Phasioli lati, prorsus nigri. Bauhin. Hist. Pl. 23 269. (1651). 
