ROBINSON: CONTRIBUTIONS FROM GRAY HERBARIUM. 259 
(1901). Dr. J. N. Rose has called my attention to the fact that 
the detached pod mentioned in the description of this species was 
erroneously associated with the rest of the material presumably dur- 
ing the mounting. It is probably the fruit of Acacia farnesiana. 
M. invisa, Martius, Flora, xx, Bd. 2, Beibl., 121 (1837). Add 
synonym MV. sepiaria, Micheli, Leguminosae Langlasseanae, 279, as 
to no, 423, not Benth. 
M. Laneuasset, Micheli, 7. ¢., 277, t. 22 (1903). From the 
description and figure it is quite impossible to find a single difference 
between this species and A, Nanti, Gray, Proc. Am. acad., v, 197 
(1861). If, however, the two prove identical the distribution of the 
species (Cape St. Lucas, Lower California, and Mt. Jorullo, Mexico) 
is unusual and interesting. 
M. Micheliana, spec. nov. Frutex armata, ramis gracillimis 
elongatis teretibus purpurascentibus glaberrimis, aculeis sparsis flavo- 
brunneis gracilibus subrectis paulo recurvatis 8 mm. longis; petiolis 
filiformibus 1.5—3 em. longis glabris obscure sparsissimeque armatis, 
stipulis filiformibus vel anguste subulatis erectis patente ciliatis, 
pinnis foliorum unijugis 3—5 em. longis, foliolis circa 8-jugis oblongis 
9-12 mm. longis 3.5-4 mm. latis acutis undique glabris margine 
adpresse ciliato-serrulato ; capitulis laxe racemosis globosis circa 7 
mm. diametro (staminibus patentibus exclusis), pedunculis ex axillo 
geminis orientibus filiformibus 2 cm. longis, floribus glaberrimis, 
calyce campanulato 1 mm. longo leviter 4-dentato; corolla erubes- 
centi 3 mm. longa, dentibus 4 angusti-deltoideis subacutis 1 mm. 
longis, staminibus 4, ovario subsessili glabro; fructu ignoto. — ©. 
schrankioides, Micheli, 7. c., 279, not Benth. — Mexico: La Correa, 
Guerrero, alt. 250 m., September, 1898, H. Langlassé, no. 386 (type 
in hb. Gr.). 
M. schrankioides, Benth., a species of British Guiana, to which this 
plant has been referred, is exceedingly different, having much larger 
and more numerous appressed-villous leaflets, hairy ovaries, longer 
petioles, ete. 
M. Netsonn, Robinson, Proc. Am. acad., xxxiii, 314 (1898). 
Add synonym J. lignosa, Micheli, Leguminosae Langlasseanae, 278, 
t. 23 (1908). 
M. pavcrrotiotata, Micheli, 7. ¢., 278 (1903). This is just the 
plant which was described in the Pros. Am, acad., xxxiii, 317 (1898), 
as M. laxiflora, var. zygophylloides, Robinson. The reduction of 
’ 
