
10 Contributions from the Gray Herbarium 
sents merely an error in determination and accordingly is not to 
be taken up for this plant as Trelease has attempted, Rep. Ark. 
Geol. Surv. iv. 178 (1891). The first specific name is Dryander’s — 
as indicated above. The proper name for the closely related — 
species commonly known as S. uncinata Willd. Sp. Pl. iv. 104 : 
(1806) is open to question. Mimosa horridula Michx. Fl. Bor. Am. : 
ii. 254 (1803), if the same, is the earlier name and the correct bie 
nomial then is S. horridula (Michx.) Heller. But so far as can be 
determined from Michaux’s description his plant may rather have 
been the earlier described M. microphylla. M. horridula Midi = : 
therefore, would seem to be a name to be discarded in accord: with 
Art. 51, 4 of the International Rules since “ certain identification — 
seems impossible.” Morongia occidentalis Woot. & Standl. Con- S 
trib. U.S. Nat. Herb. xvi. 135 (1913) seems to be merely a pubes- 
cent state of S. Roemeriana (Scheele) Blankinship. This se 
exhibits a tendency to be more or less pubescent even in the region ; 
of the type (southern Texas) and this character becomes more 
evident in specimens from farther north. Tracy’s no. 8018, for | 
instance, from Big Springs, Howard County, is quite as pubescent» 
as the New Mexican material. I am also unable to see any‘ 
ference in the nature of the prickles on the fruit of the t 
glabrate form and on that of the more pubescent state. 
SCHRANKIA QUADRIVALVIS (L.) Merrill, var. jaliscensis, Meise 
eu foliolis SD en aculeatissimis io pedun- 
s. — Mexic uadalajara, ) 
44 Shtecen, cna teat, ); also 5136; Rio Bane. Jalisco, P almer, 














This i is very possibly a distinct species but I hesitate at: this . 
to give it more than varietal recognition because of the seeming 
great variability displayed by all the species. Even those ee 
acters generally relied upon to distinguish species in this 8@ 
appear to be none too stable. For instance a series of speci 
of S. quadrivalvis from Saltillo and Monterey displays 
variation in the prominence of the veins of the leaflets, ra 
relative obviousness of the leaflet-veins of S. microphylla ane 
uncinata furnishes the chief means of distinguishing thes? ' : 
and indeed it seems a reliable character so far as these plants: ; 
concerned. Bentham, Trans. Linn. Soc. xxx. 442 fe ad 
tioned the constancy of this character. But unfort 
