BOTANY. 
no 
4—5,000 feet altitude; May—August. Avery showy species/with sometimes 
50 flowers upon a single plant; main stem erect, becoming 9 /y in thickness 
and occasionally showing 25 annual rings, w.] (438.) 
Opuntia aeboeescens, 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 feutescens, 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. 
Sesuvium poetulacasteUm, L., Var. Leaves spatulate-obovate and ob¬ 
tuse, as in S. pentandrum. Florida to NUw Jersey. Growing in alkaline 
soil, Truckee Meadows and at the Hot Springs near Meigs’s Station, Nevada ; 
4,500 feet altitude; May-July. (439.) 
UMBELLIFERH5. 
Oeogenia 1 lineaeifolia. Stem leafless, rising but an inch or two above 
the ground and very slender; leaves 2-3, upon filiforin petioles, equaling the 
stem ; leaflets 1—2 y long and l /x wide, petiolulate, obtuse; umbels with 2—3 
rays, 1—4'' long ; umbellets 3—5-flowered; flowers nearly sessile ; involucre 
none; involucels of a few (1-3) linear leaflets exceeding the rays ; fruit 
1J-2" long, oblong, subcompressed; tubers small, rounded, 3-5" in diameter.— 
Damp shaded ridge of the Wahsatch, north of Parley’s Park; 7,500 feet alti¬ 
tude; June 28, in fruit. Near to Erigmia , both in habit and characters. 
Plate XIY..... Fig. 1. Plant; natural size. Fig. 2. Carpel; enlarged four di¬ 
ameters. Fig. 3. Cross-section of same; enlarged eight diameters. (440.) 
1 OEOGENIA. Calyx-teeth minute. Stylopodia somewhat elevated. Fruit ovoid, but slightly 
compressed laterally and with a commissure but little narrowed ; carpels dorsally compressed, slightly 
incurved; the 3 dorsal ribs filiform, the lateral thickened, corky and involute; vittae obscure, 3 in each in- 
‘ terval, and 2-4 in the commissure. Carpophore (?) adnate to the carpels and forming a thick corky mid¬ 
rib dividing the hollowed face of the commissure longitudinally. Seed somewhat concave.—Dwarf, 
scarcely caulescent, glabrous. Eoot tuberous. Leaves radical, 1-2-ternate; segments entire, linear. 
Umbel subcompound, with few very short unequal rays. 
Missouri Botanical Gardes 
George Engelmann Papess 
