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. 5, Pt. 2

APPENDIX.
about an inch in diameter, acutely repand-toothed; the petiole usually a little longer than the
lamina, and the lower ones sometimes twice as long. Flowers few, in a loose terminal raceme,
the lower ones often axillary; upper ones subtended by small foliaceous bracts. Pedicels sometimes very short, but more commonly one-third or one-fourth the length of the ovary. The
free portion of the calyx-tube about one-third the length of the ovary. Petals broadly obovate
entire, 4 or 5 lines long, at first yellow, but turning rose-color after, flowering. Stigma capitate.
Capsule 1 or 11 inch long, and about a line in diameter; acute at the base. Seeds obovate;
testa membranaceous.. This species differs from (E. clavoformis and CE. brevipes in the cordate
leaves and naked petioles. From CE. scapoidea in the leafy stem, the form of the leaves, the
elongated linear capsules, and the shorter pedicels.
AMMAKNIA LATIFOLIA, Linn.; Torr. & Gray, Fl. 1, p. 480. On the Lower Colorado. Resembles the eastern plant, except that the style is shorter.
PHORADENDRON CALIFORNICUM, Nutt. in Jour. Acad. Phil. n. ser. 1, p. 185. With the lat.
PRORADENDRON FLAvESCENS, var. GLABRIUSCULUM, Engelm. in Gray, Plant. Lindh. 2, p.212.
On the Mesquite, (Algarobia glandulosa); rarely on Cotton-wood.
PECTIS PAPPOSA, Harv. & Gray, in Gray,- PI. Fendcl. p. 62. California desert. It is called
Mansanilla coyote by the Mexicans.
MACH,RANTuERA CANESCENS, var. LATIFOLIA, Gray, PI. Wright, 2, p. 75. Alluvial banks of
the Great Colorado; Sept.-Oct. Stem 1-2 feet higlh.
PALAFOXrA LINEARI$, Lagcssca; DC. Prod-r. 5 p. 124. Desert west of the Colorado. Stem 1-2
feet high. Flowers pale purple.
C(fENACTIS TENUIFOLIA, Nutt.; Torr. & Gray, Fl. 2, p. 370. Near Fort Yuma. All the
specimens were small and slender. Leaves mostly simply pinnatifid, the few divisions scarcely
more than half a line wide. Ray and disk-flowers nearly equal. Pappus of 4 nearly equal
ovate-lanceolate acuminate scales.
TRICHOPTILIUM INISUM, Gray, in Bot. Mex. Bound. ted. Psathyrotes incisa, Gray, PI. Thurb.
In the Colorado desert, California, where it was first discovered by Mr. Thurber, and afterwards
by Lieut. Du Barry and Mr. Schott. We have received the plant from no other station. (Tab. V.)
TESSARIA BOREALIS, Torr. & Gray, in Emory'8 Rep. p. 143; Torr. in Sitgr. Rep. t. 5. Cariso
creek, and in all wet places, from the Colorado to the mountains east of San Diego.
iEREMIASTRUM BELMOIDES, Gray, Plant. Thurb. p. 321. Desert west of the Colorado. Our
specimens are much more advanced t-han those collected by Mr. Thurber, but we have nothing
to add to Dr. Gray's description except what may be derived from our figure. (Tab. VI.)
BAILEYA MULTIRADIATA, Harv. & Gray, Pt. Fendi. p. 106, adnot. Near Fort Yuma. B.
pleniradiata seems to be scarcely distinct.
BAcCHARIS C^RuLEsGEN5, DG. Prodr. jp. 402. Banks of the Colorado; mostly in the vicinity
of water-holes, but sometimes in dry places. The plant is often 14 or 15 feet high, and much
branched. The leaves vary from entire to acutely dentate-serrate.
BACCHARIS EMORYI, Gray, in Bot. Whipple'8 Exped. With the last. Resembles B. angustifolia.
ENCELIA CONSPERSA, Beuth. Bot. Sulph. p. 26. With the last.
FRANSERIA lloo:HRIANA, Nult. in Torr. & Gray, Fl. 2, p.-294. A common wreed on the Lower
G~ila, and west to the Pacific.
HYMENOCLEA MONOGYRA, Gray. With the last. In some of the specimens the scales of the
involucres are spirally disposed, showing a tendency to pass into H. Salsola, which we suspect
may prove to be an abnormal state of HI. monogyra.
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