F 



35 



98. Zornia tetraphylla Michx. Pemi (Dnval county). 



99. Desmodium spirale DC. Limpia canon (Prositlio county). This seems to 1)0 



tlie first record of this Mexican spccicB occurring in the United States. It 

 is quite variable in its pubescence, as well as its leaves. Our specimens are 

 all 3-foliolate, and hence seem not to be the same as D. aiiniium CI ray (described 

 from Wright's Sonoran specimens), which Grisebach has included under D. 

 spirale DC. However, they are clearly the same as the Mexican D. spirale 

 of Fringle, no. 612, and of Parry tf Palmer, no. 181, and accord well with all 

 published descriptions. 



100. Desmodium Wiightii Gray. Chenate Mountains {Presidio county). 



101. Vicia Ludoviciana Nutt. Point Isabel. 



102. G-alactia heterophylla Gray. Pena (Duval county) and Chenate Mountains 



(Presidio county). This remarkable species was first collected by Lind- 

 heimer. Nealley's collection brings excellent specimens from both Pena ia 

 eastern Texas, and the Chenate Mountains of western Texas. 



103. Cologania longifolia Gray. Chenate Mountains (Presidio county). 



104. Phaseolus acutifolius Gray. Limpia canon (Presidio county). This species 



has heretofore been collected only in Arizona, New Mexico, and Mexico. Our 

 specimens represent the large-leaved Mexican form. 



105. Phaseolus umbellatus Britton. (P. helvolus of Am. authors, not of L.) Cor- 



pus Christi. 



106. Phaseolus macropoides Gray. Chenate Mountains (Presidio county). So 



far as the United States is concerned tliis species has only been found in 

 New Mexico by Wright, in 18,')1 ; by the Mexican IJouudary Survey; and 

 lately (1881) by Riisby in the Mogollon Mountains. Mr. Nealley's discovery 

 of it in extreuje western Texas not oulj^ brings us more of a rare plant, but 

 considerably extends its range. Pringle 12:5:? (1887), from plains near 

 Guerrero, Chihuahua, referred to P. heterophyllus Willd., also seems to bo this 

 species. 



107. Rhynchosia menispermoidea DC. Corpus Christi. 



108. Rhynchosia Texana Torr. & Gray. Corpus Christi. 



109. Hoffmanseggia Jamesii Torr. & Gray. Pena (Duval county). 



110. Hoffmanseggia melanosticta Gray. Chisos Mountains (Foley county). So 



far as I know, this species has been reported but once from the United States 

 side of the Rio Grande, and then by I'arry, in the valley of the Rio Grande 

 below Donna Ana, in the Mexican Boundary Survey. It was found originally, 

 and but once since, in northern Mexico (by Edwards at Riuconada and 

 Monterey, and by Gregg near Buena Vista and in a valley near Azufrora), and 

 is altogether one of the rarest of species. This Cliisos Mountain collection 

 contains (juite an amount of fruiting and flowering material. The speci- 

 mens conform exactly to the ()riginal description. In the case of the Mexican 

 Boundary Survey siteciniens Dr. Torrcy spt^aks of the ]dants ditlering some- 

 what from the description of Schauer in having only two or three pairs of 

 leaflets, and the vexillum destitute of glands and dots. In the Nealley 

 specimens tlie leaflets arc three and tour pairs (mostly the former), and the 

 vexillum is decidedly dotted; the single specimen of Parry that we have 

 seen shows the same characters. This species is the only American represent- 

 ative of the section Melanosticta, the two other species being South African. 

 The section is characterized chiefly by the densely black-glandular calyx- 

 lobes. The species somewhat resembles our common If. Jamexii Torr. &l 

 Gray, but the leaflets are fewer, larger, and more distant, the whole plant 

 more villous, and the legumes larger and much more muricato and glan- 

 dular. As no description of tlie species has been published in English, and 

 the Latin description is not very accessible, 1 append a translation of the 

 description given in Walp. Ann. i. 257: "Fruticose: branchlets and racemes 



