224 Plants from Sinaloa, Mexico. [ZOE 
A rudimentary style has been noticed by Dr. Gray in the de- 
scription of G. Greggiiz. Growing abundantly about the rocky 
summits of the Cerro Colorado. 
Zexmenia fasciculata Sch. Bip., was collected on Cerro Colo- 
rado and in the arroyos running from the mountain. 
Zexmenia Seemannii Gray. Cerro Colorado. Determined by 
Dr. J. M. Greenman. 
Bidens refracta Brandegee, is very common about Cofradia. 
The species was first found at Miraflores, Baja California, and 
the type locality is the only one known on the Peninsula, where 
it was probably introduced from Sinaloa, 
Bidens Alamosana Rose, is common on the low lands along the 
rivers near Culiacan. It becomes 8 ft. high and the large, 
orange-colored rays are conspicuous. 
Bidens oligantha. Annual, 2-3 dm. high; stems slightly 
puberulent, sulcate, simple or with 2-3 branches from below the 
middle: leaves trifid, almost pinnate; the middle lobe linear- 
lanceolate, acuminate, more or less serrate, 2 cm. long or less; 
the lateral lobes 5-8 mm. long, ovate-acuminate, often incised; 
uppermost leaves linear-lanceolate: peduncles 2-6, 6-10 cm. 
long: outer involucre of ovate-lanceolate bracts 3 mm. long, 
equalling the inner: rays 3 mm. long, white striped with purple: 
akenes variable, when mature about 5 mm. long, beaked or 
truncate in the same head, curved, smooth or hispid on the 
angles: awns 2 or none, 1 mm. long, divergent. Cofradia. 
Tridax procumbens I, Common along the banks of the 
Cofradia River. 
Galinsoga filiformis Hemsley, is very abundant in damp soil 
about Cofradia. 
Perityle grandifolia. Stems branching from a suffrutescent 
perennial root, 1-2 dm. high; whole plant pubescent: leaves 
broadly ovate, 5-7 cm. long, 4-5 cm. wide, crenate-serrate, thin 
in texture, on petioles 3-4 cm. long: rays yellow, 5 mm. long, 
1.5 mm. wide: involucral scales linear, 5-6 mm. long: akenes 
without callous margins and pappus: corollas 4 mm. long, nar- 
row; tube puberulent; style-branches slender-subulate. 
Growing on rocks of Cerro Colorado. P. dissectaalso has subulate 
