APPENDIX. 
361 
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 some¬ 
times 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 1^ inch long, and about a line in diameter ; acute at the base. Seeds obovate ; 
testa membranaceous. This species differs from (E. clavseformis and (E. brevipes in the cordate 
leaves and naked petioles. From <E. scapoidea in the leafy stem, the form of the leaves, the 
elongated linear capsules, and the shorter pedicels. 
Ammannia latifolia, Linn.; Torr. & Gray, FI. 1, p. 480. On the Lower Colorado. Re¬ 
sembles the eastern plant, except that the style is shorter. 
Phoradendron Californicum, Nutt, in Jour. Acad. Phil. n. ser. 1, p. 185. With the last. 
Phoradendron 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. Fendl. p. 62. California desert. It is called 
Mansanilla coyote by the Mexicans. 
Machjeranthera canescens, var. latifolia, Gray, PI. Wright, 2, p. 75. Alluvial banks of 
the Great Colorado ; Sept.-Oct. Stem 1-2 feet high. 
Palafoxia linearis, Lagasca; DO. Prodr. 5 p. 124. Desert west of the Colorado. Stem 1-2 
feet high. Flowers pale purple. 
Chenactis tendifolia, Nutt.; Torr. & Gray, FI. 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 incisum, Gray, in Bot. Mex. Bound, ined. Psathyrotes incisa, Gray, PI. Thurh. 
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. Y.) 
Tessaria borealis, Torr. & Gray, in Emory's 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. 
Eremiastrum bellioides, Gray, Plant. Thurh. p. 321. Desert west of the Colorado. Our 
specimens are much more advanced than 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. YI.) 
Baileya multiradiata, Harv. & Gray, PI. Fendl. p. 106, adnot. Near Fort Yuma. B. 
pleniradiata seems to be scarcely distinct. 
Baccharis caerulescens, DO. Prodr. p. 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’sExped. With the last. Resembles B. angustifolia. 
Encelia conspersa, Benth. Bot. Sulph. p. 26. With the last. 
Franseria Hookeriana, Nutt, in Torr. & Gray, FI. 2, p. 294. A common weed on the Lower 
Gila, 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 H. monogyra. 
46 F 
