214 Plants from Sinaloa, Mexico. [ZOE 
with a slightly auriculate base, the larger 15-20 mm. long, the 
opposite one 2-7 mm. long; pedicels solitary, 4-5 mm. long, 
bractless; calyx tube 4-5 mm. long; spur triangular, 1-2 mm. 
long; dorsal lobes salmon yellow; the 4 ventral, dark violet, oval 
petals 3 mm. long, on short claws; the dorsal petals slightly 
smaller, on filiform claws, lavender-colored: the 9 ventral sta- 
mens subequal, two very tomentose, the 2 dorsal much smaller; 
disk dorsal; ovules 4; seeds orbicular with a narrow margin. 
Cofradia and Cerro Colorado. Growing in thin, rocky soil 
that soon becomes dry. 
Cuphea lobophora Koehne. Various forms were collected at 
Culiacan. Cofradia and Cerro Colorado. 
Cuphea Palmert Watson. The plant referred to this species 
grows about Culiacan during the early part of the rainy season. 
The leaves are ovate-lanceolate and the four ventral petals white. 
Cuphea Humayana. Annual; stem simple, erect 3-4 dm. 
high, pubescent and glandular; leaves ovate-acuminate, cordate 
to cuneate at base, 2.5 cm. and less wide, 5 cm. and less long, 
scabrous-hirsute on both faces; petioles 1.5 cm. long; flowers 
usually two from about the axils of the upper leaves and the 
linear-lanceolate, ciliate bracts; calyx 11-13 mm. long, 6-7 mm. 
wide, at maturity closed by the produced dorsal lobe, hirsute, 
slightly gibbous; pedicels 3 mm. long; dorsal petals obovate, on 
long claws, purple, the 4 ventral white, linear and shorter; 
stamens included, the filaments more or less bearded; disk erect; 
seeds brown, 3. 
This Cuphea belongs to § Heterodon. It differs from C. Palmeri 
in the broader, less gibbous calyx, the larger, often cordate 
leaves and in having no scales below the dorsal petals, also the 
seeds are only three. Collected on low damp ground near 
Culiacan. 
Ammania auriculata Willd. Growing in mud-depressions 
along the rivers. Culiacan. 
Rotala dentifera Koehne. Culiacan. 
Lennoa madreporoides Lav. & Lex.? Parasitic on Boerhaavia. 
Growing in sand near Culiacan, 
