[Vou 11 
234 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
M. alsinoides is most closely related to M. Pulsiferae with 
which it has often been confused. The unequal calyx-teeth, 
2 of which are truncate and longer than the 3 triangular-acute 
upper ones, distinguish this species from any other Mimulus 
except M. pachystylus. 
49. M. pachystylus Grant! 
A low creeping perennial; stems 1-3 dm. long, viscid-pilose, 
with long soft hairs, prostrate, rooting freely from the nodes, 
1-3 dm. long; leaves broadly ovate, 1-3 cm. long, .5-2 em. wide, 
acute, coarsely dentate, pinnately-nerved, thick and usually 
glabrous, petioles short, viscid-pilose; flowers axillary, pedicels 
shorter than the leaves, densely viscid-pilose; calyx broadly 
campanulate, 9-10 mm. long, nearly glabrous, teeth short, 
broadly truncate, mucronate, the 2 upper teeth longer than the 
3 lower ones, sometimes with smaller teeth in between, throat 
oblique; corolla bilabiate, 1.3-1.4 em. long, broadly funnelform, 
apparently yellow, tube broad, included, throat slightly ex- 
serted, ampliate, with two densely bearded ridges below the 
lower lip, lobes unequal, broad, rounded; stamens glabrous, 
included, the upper pair sometimes longer than the style, anthers 
joined at least half their length; style glabrous, much thickened, 
sometimes with a swollen base, stigma-lobes broad, rounded, 
laciniate, equal; capsule ovate, attenuate, placentae adherent 
to the apex; seeds oval, apiculate at one end, favose areolate. 
Distribution: known only from Chiapas, Mexico. 
Specimens examined: 
Chiapas: Cerro del Boqueron, Aug., 1913, Purpus 7015 (0. 8. 
and M, TYPE). | 
1 Mimulus pachystylus Grant, sp. nov., perennis repens; caulibus viscido-pilosis, 
stigma 
са ovata, attenuata.—Collected at Cerro del Boqueron, Aug., 
pus 7015 (U. S. Nat. Herb., and Mo. Bot. Gard. Herb., no. 741579, ТҮРЕ). 
