Macbride — Notes on certain Leguminosae 11 
of the species appears to be sharply defined, or the real characters 
are yet to be indicated. 
Schrankia pilosa (Standley), comb. nov. Morongia pilosa 
Standley, Contrib. U. S. Nat. Herb. xviii. 105 (1916). 
Seemingly specifically distinct from S. distachya DC. by virtue 
of the numerous crowded pinnae, leaflet-bearing nearly to the 
base. Standley also mentions the short peduncles and pilose stem 
as diagnostic characters but the heads of S. distachya are some- 
times subsessile and all the species seem to vary from glabrous to 
distinctly pubescent. 
Mimosa BOREALIS Gray, Mem. Am. Acad. n. ser. iv. 39 (1849). 
Wooton & Standley, Contrib. U. 8. Nat. Herb. xix. 332 (1915), 
have confused, perhaps inadvertently, this species and M. fra- 
grans Gray, Bost. Journ. Nat. Hist. vi. 182 (1850). At least this 
is the case if I interpret correctly their note to M. fragrans but 
their remarks are so poorly and obscurely worded that it is im- 
possible to determine definitely to which species they refer. How- 
ever this may be, the species are, as Dr. Robinson, Proc. Am 
Acad. xxxiii. 324-325 (1898), has pointed out, very closely related 
and indeed it may be questioned whether they are truly distinct. 
The constancy of the characters which appear from herbarium 
material to differentiate M. borealis and M. fragrans can be proved 
only by observation in the field. It seems possible to distinguish 
Specimens as follows. 
Leaflets 2-4 mm. _long, crowded, rarely placed 2. mm. 
ae 3-5 pairs; pod smooth or rarely more or less 
M. borealis. 
Leaflets 47 mm. long, relatively distinct, about 3 
pairs; pod apparently not at all or oon 
slightly OE i ee M. fragrans. 
The pods of the type of M. borealis are spiny but material with 
smooth pods is not otherwise distinguishable and this character is 
known to be variable in the case of related species. Specimens of 
M. borealis, hitherto known from New Mexico and western Texas 
— been distributed from western Oklahoma by Dr. G. W. 
tevens 
es ACULEATICARPA Ort., desmanthocarpa noe 
comb. nov. M. acanthocarpa (Willd) Benth., var. desmanth 
Robinson, Proc. Am. Acad. xxxvi. 472 (1901 ). 
