Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean: Vol. 2, Pt. 4

BOTANY.
PHYTOLACCACEAE.
PHIYTOLACCA DECANI)DRA, Linn. Near Fort Washita; April.
POLYGONACE2E.
POLYGONUM LAPATHIFOLUM, LTinn.?.Will. Sp. pl. 2, p. 442. Near Fort Washita. Perhaps
not distinct from P. Persicaria.
ERIOGONUM LONGIFOLIUM, Nutt. in Tran8. Amer. Ph7il. Soc. (n. ser.) 5, p. 164. E. Texanum,
Scheele. Gravelly soil, on the Pecos; April.
ERIOGONIUM CERNUUM, Nutt. in P1. Gambel.? Llano Estacado, sandy soil. It differs in the
pubescence of the leaves being rougher and more persistent.
RUMEX VENOSUS, Pursh, Fl. supp. 2, p. 733. Delaware creek, and along the Pecos; March.
RUMEX ACETOSELLA, Linn.; Pursh, Fl. 1, p. 249. Western Texas. Probably introduced.
RUMEx BRITANNICA, Linn.; Toir. Fl. New Yor7, 2, p. 155. Western Texas.
NYCTAGINACEtE.
ABRONIA CYCLOPTERA, Gray, in Sill. Jour. (n. ser.) 15; Torr. in Marcy's Rep. t. 18. Llano
Estacado to Fort Chadbourne; April, May. In flower only.
OXYBAPHUS ANGUSTIFOLIUS, Torr. in Amer. Lye. New York, 2, p. 237. On the upper Colorado;
April.
OXYBAPHUS HIRSUTUS, Sweet; Hook. Fl. Bor.-A4m. 2, p. 124. On the Colorado; April.
ACLEISANTRES BERLANDIERI, Gray, in Sill. Jour. 1. c. On the Pecos; March, Foliage only.
EUPHORBIACEfE.
TRAGIA RAMOSA, Torr. in Ann. Lye. New York, 2, p. 245. Gravelly soils; March.
CNIDOSCOLUS STIMULOSUS, Engelm. and Gray, Pl. Lindl., part 1, p. 26. Sand-hills of Llano
Estacado and Western Texas; March to May. Flowers larger than in the eastern plant.
STILLINGIA LANCEOLATA, Nutt. in Trans. Phil. Soc., (n. ser.) 5, p. 176. Sandy soil, Western
Texas; April to May.
HENDECANDRA CROTONOIDES, Hook. and Arn. Bot. Beech, p. 388. This is the same as No.
1800, P1. Wright. It was found also by Fremont on the Gila. It is quite a distinct species
from H. procumbens. The Mexicans call it Yerba del Gato, and use it as a purgative.
EUPIORBIA ARKANSANA, Engelm. and Gray, 1. c. no. 303. Intermediate between E. platyphylla and E. Helioscopia. Sandy soil. Collected in a journey to Fort Chadbourne, and on the
head-watQrs of the Colorado.
EUPRORBIA GEYERI, Engelm. and Gray, P1. Lindh. 1, p. 52. Western Texas; May.
EUPHORBIA WRIGHTII, (n. sp.): stem herbaceous from a somewhat ligneous base, erect, much
branched; leaves opposite, sessile, narrowly lanceolate-linear, entire; involucres solitary, PCdunculate, mostly terminal or in the uppermost forks of the stem, pubescent; glands transversely oblong, entire, with a large petaloid broadly obovate denticulate appendage; capsule
very minutely papillose-pubescent; seeds glabrous. Head-waters of the Colorado; April. This
is the same as No. 1827 of Mr. Wright's New Mexican collection, (1851-52). It is about a
foot high, branching from the base; the branches green and angular. Leaves an inch or more
in length, and 2-3 lines wide. Peduncles variable in length, occasionally 2-3 times longer than
the hemispherical involucre, but usually shorter. Petaloid appendages conspicuous. Styles
very short, spreading, 2-cleft about half-way down. Capsule coriaceous. Seeds subglobose.
EUPHORBIA ALBOMARGINATA, (n. sp.): perennial, slender, much branched, smooth; leaves stipulate, opposite, suborbicular, subcordate, entire, distinctly petiolate; involucre solitary, shorter
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