260 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
the leaflets to a single slightly enlarged pair gives a rather distinct: 
habit, but the examination of a series of specimens of the rather 
variable M. laxiflora, Benth., leads to the conclusion that this plant 
is only an extreme variation of that species. 
i—— M. polyanthoides, spec. nov. Fruticosa 3-5 m. alta, ramis 
striatis griseo-brunneis aculeis magnis compressis recurvatis atroru- 
bentibus subaxillaribus munitis; foliis 1.5 dm. longis, pinnis 4~7-jugis 
3-4 cm. longis basi geniculatis : stipellatis, rhachide rhachillisque 
angulatis sparsissime pubescentibus, foliolis 13-1 7-jugis oblongis 
glabris 8 mm. longis 3-4 mm. latis apice rotundatis mucronatis basi 
obliquis supra viridibus subtus vix pallidioribus; floribus spicatis 
ignotis, spicis 2-3 cm. longis breviter pedunculatis, pedunculo puber- 
ulo rhachide florifero glabrato; legumine compressissimo 5-6 cm. 
longo 10-13 mm. lato irregulariter crenato apice abrupte acuminato 
stylo tenui saepe faleato breviter rostrato basi longe cuneato-atten- 
uato, stipiti circa 1 em. longa, replo valvisque setoso-hispidis, semini- 
bus 8.—Mexico: on mountains above Iguala, Guerrero, alt. 1230 m.,. 
© October, 1900, C. G. Pringle, no, 8408 (type in hb. Gr.). 
Distributed as M. polyantha, Benth., but readily distinguished 
from that species by its more numerous pinnae and leaflets and 
especially by its long-stiped and somewhat larger fruit. From ©. 
stipitata it differs in the larger leaflets and broader hispid not 
glabrous pods. 
M. rhododactyla, spec. nov. Frutex ramoso 3 m. alto, ramis. 
gtiseis flexuosis in specimine viso inarmatis, ramulis flavescenti- 
tomentellis ; stipulis parvis subulatis, petiolis propriis 12-16 mm. 
longis et rhachidibus foliorum circa 4 em. longis inarmatis tomentellis, 
foliis bipinnatis, pinnis circa 9-jugis 2 cm. longis, foliolis 9-14-jugis 
anguste oblongis haud imbricatis apice rotundatis basi obliquis supra 
glaberrimis subtus adpresse pubescentibus arcte sessilibus 3 mm. 
longis, floribus pallide roseis dense spicatis, spicis cylindricis 4 cm. 
longis longe pedicellatis binis vel trinis orientibus in racemis longis . 
terminalibus dispositis; calyce brevi extus sericeo-pubescenti, corolla 
1.6 mm. longa extus sericeo-pubescenti ad mediam in dentes 5 ovato- 
deltoideos acutiusculos secta; staminibus 10; fructu ignoto.— ©. 
erula, Micheli, 7. ¢., 279, not Benth, — Mexico: in tropical 
region at Las Higueritas near the boundary between Michoacan and 
Guerrero, on granitic soil, alt, 500 m., 11 July, 1898, F. Langlassé. 
Although T have never seen authentic material of M. puberula, 
