(33) 
with a free projection down the stem, closely set but hardly imbri- 
cate; flowers few, near the tops of the branches, sessile or short- 
pediceled ; sepals leaf-like, shorter than the petals, somewhat un- 
equal; corolla-segments pure white, oblong, acute, 5 mm. long, 
slightly united at base, nearly flat; appendages minute; stamens 
shorter than the corolla 
Collected by J. N. Rose on dry rocky hills near Tepeaca, south 
of Puebla, June 27, 1899 (no. 4996). Living specimens were sent 
to the Washington Botanical Garden and flowered in the open, June, 
1g00. From these the above description is drawn. 
ALTAMIRANOA FUSCA (Hemsl.) Rose. 
Sedum fuscum Hemsl. Biol. Centr. Am. Bot. 1: 395. 1880. 
Described as an annual but perhaps a biennial or possibly a per- 
ennial, diffusely branching, 1 dm. high or less; leaves hee) ob- 
long, fleshy, 4-6 mm. long, obtuse; inflorescence cym mere 
cels 2 mm. long or ieee sepals distinct, free at base; le 
ments white, united for one fourth their length. 
Only known from the region about San Luis Potosi, Mexico. 
ALTAMIRANOA CHIHUAHUENSIS (S. Wats.) Rose. 
Sedum Chihuahuense 5. Wats. Proc. Am. Acad. 23: 273. 1888. 
escribed as annual but producing small tubers, simple below, 
branching above, ee cm. tall; leaves sessile, oblong or oblong- 
lanceolate, obtuse, 2— m. long; corolla-segments white, united 
at base, oblanceolate, as mm. long; carpels divergent above. 
Rocky ledges, Sierra Madre of Chihuahua, Mexico. A very 
peculiar species and not well understood. 
STYLOPHYLLUM Britton & Rose, gen. nov. 
Perennials with more or less branched rootstocks; basal leaves 
linear, elongated, terete, or flattened but always narrow, sometimes 
lobes ovate, equal and small. Corolla campanulate, not angled, 
white, red or yellowish, its lobes broad, thin and spreading, united 
below into a tube. Stamens ro, borne on the corolla-tube. Car- 
pels 5, united below, generally strongly spreading as in Sed. 
The type species, Cotyledon edulis Nutt., has been referred to 
both Sed and Cotyledon. The name is in allusion to the pen- 
cil-shaped leaves of the type species. 
1. STYLOPHYLLUM viscipUM (S. Wats.) Britton & Rose. 
Cotyledon viscida S. Wats. Proc. Am. Acad. 17: 372. 1882. 
Southern California. 
