120 
4-5,000 feet altitude ; May-August. A very showy species,\with sometimes 
50 flowers,upon a single plant; main stem erect, becoming 9" in thickness 
and occasionally showing 25 annual rings, w.] (438.) <: ■: 
' Opuntia arborescens, Eng. 3-5° high or more, with horizontal 
branches, cylindric strongly tuberculated joints, numerous sheathed spines, 
large purple flowers, and tuberculated unarmed fruit.—New Mexico and Ari¬ 
zona, and probably farther northward. 
Opuntia acanthocarpa, Eng. & Big. Similar to the last; rather more 
slender and with more erect branches, smaller copper-colored flowers and 
rather even spiny, fruit.—Arizona, and probably Southern Utah. 
Opuntia frutescens, Eng. 2-4° high, with slender terete joints 3" in 
thickness, very small yellow flowers and scarlet berries.—From Texas to 
Southeastern California, and probably farther northward. * 
FICOIDEiE. 
SeAtyium portulacastrum, L., Leaves 
tuse,~ as in 8. pentandrum. Florida/to 3^ew Jer 
soil, TrupVee Meadows and at thd Plot Springs near 
500 fee 
^atu' 
JX ob- 
r in alkaline 
A Station’, Nevada; 
altitude; May-July. (A9.) 
TTM-R^T T TWP af^SDURr BOTAHIC^C GARDEN 
UMBELLIFER^ Gforge Engelmann papers 
Oro^enia 1 linearifolia. Stem leafless, rismg but an inch or two above 
and very slender; leayes 2-3, upon filimrm petioles, equaling the 
flets 1— 2' long and l^rvide, petiolulate, obtuse; umbels with 2—3 
long ; umb diets 3—5yflowered; flowers nVarly sessile; involucre 
linear' leaflets exceeding the rays; fruit 
|he grout d 
stem ; lei 
iM 
rays, 
none 
li-2" long, 
Damp sha l 
"tude; Jun 
ameters. 
in olucels of a few (1- 
oblong, subcompress d; tubers small, roundeck 3-5 7/ in diameter.— 
ed ridge of the Wah atch, north of Parley^' PM: ; 7,500 feet alti- 
28, in fruit. Nea /to Erigenia , both in halm and characters. 
Plate XI f. Fig. 1. Plant ; r itural size. Fig. 2. Carpel ; Vnlarged four di- 
3. Cross-sectio v of same; enlarged eight diarnVters. (440.) 
' ' 1 OROG3SYTA. Calyx-teeth minut 
compressed .latAally and with a commiss n 
. incurved; the Stlorsal ribs filiform, the la 
yfcerval, and 2-4l» the commissure. Carp ph< 
prib dividing th<j hollowed face of the < 
^scarcely caulescpnt, glabrous. Root tu 
' tlmbel subcompound, with few very short unequal 
Stylopodia somewhat elevated. Fruit oroid, but slightly" 
but little narrowed; carpels dorsally comjbressed, slightly 
eral thickened, corky and involute; vittse ohsc^b, 3 in each in-- 
0> adnate to the carpels and forming a tMck corky mid- 
missure longitudinally. Seed somewhat conqave.—Dwarf, 
Leaves radical, 1-2-ternate; segments e\fcire, linear, 
’ rays. 
n 
\ 
