172 MISSOURI BOTANICAL GARDEN. 
Typical form. 
AA. Leaves obtusish, mucronulate, oval to oval-oblong. 
B, Leaves villous beneath, oval to elliptic-ovate; calyx pilose and 
glandular; corolla usually hairy without, large. 
f. Schaffneri, forma nov. 
Mexico: San Luis Potosi (Schaffner, no. 363, Parry 
& Palmer, no. 297, Ghiesbreght, no. 699). 
BB. Leaves, like the whole plant, quite glabrous, usually oval-oblong. 
f. tubulosa, forma nov. 
L. tubulosa, Bentham, Plant. Hartweg. 1: 37 (1839). 
Mexico (Hartweg, no. 292! Schaffner, no. 733, Coulter). 
The specimen of Townsend & Barber, collected in Chi- 
huahua, Colonia Garcia, has the pair of leaves below the 
disk furnished with stipular appendages as in LZ. Arizon- 
ica and L. hispidula. 
136. L. subaequalis, spec. nov. 
Twining shrub. Branches, like the whole plant, glabrous 
except the inflorescence. Leaves elliptic to oblong-obovate, 
7-10 cm. long, obtuse, narrowed at the base into a short 
petiole; the uppermost pair connate into an elliptic disk, 
4—6 cm. long, acute at both ends, separated from the pair 
below by a slender internode 4—6 cm. long. Flowers in a 
sessile whorl; bractlets one-third to one-fourth as long as 
ovaries, semi-orbicular, ciliate; ovaries glandular near the 
apex; calyx about one-fourth as long as ovary, with short 
rounded lobes, glandular; corolla funnelform 2.5—3 cm. 
long, tube somewhat curved, pilose and sparingly glandu- 
lar without and hairy within, about four times longer than 
limb; lobes of limb almost equal, ovate; stamens inserted 
somewhat below the limb, filaments glabrous, about as long 
as the linear-oblong anthers; style exceeding the corolla, 
glabrous; fruit unknown. — Plate 4. f. 7-9. 
