1895.] Undescribed Plants from Western Mexico. 535 
Calea submembranacea, n. sp.—Suffrutescent, five or six 
feet high, the many-grooved branches sparingly villous: 
leaves submembranaceous, on petioles a line or so long, ob- 
long-lanceolate, subcordate at base, attenuated to a subapicu- 
late tip, smooth and shining on both surfaces, or sparingly 
villous on the veins beneath, entire, or with a few scattered 
teeth; the largest three and one-half inches long: heads four 
to six in terminal or lateral corymbs; the peduncles and pedi- 
cels villous-lanate: involucral scales lanceolate, in four or five 
series; the outer short series villous, ciliate, and obtuse; the 
inner longer series becoming glabrate, or merely ciliate, acut- 
ish: flowers strongly pubescent below; rays about twenty, ob- 
long, whitish, with about seven dark nerves, three-toothed at 
the tip; disk-fowers many: pappus scales fifteen to twenty, 
linear-subulate, ciliate-erose on the margins; achenes subte- 
tragonal, hirsute. —Collected on a mountain side at Zopelote, 
Tepic, at 3,000 feet altitude, by Mr. Lamb, February 9, 1895 
(no. 554). In habit closely resembling C. scabrifolia Benth. 
Hook., but well distinguished by the thinner glabrous 
leaves, villous stem, and hirsute achenes. 
Ipomoea amplexicaulis, n. sp.—A very slender vine, climb- 
ing over bushes to the height of ten or twelve feet: stems 
sparingly hispid or glabrate: leaves remote, an inch and a 
half long or less, glaucous, on very short petioles (two-thirds 
line), ovate, cordate, with rounded base and deep closed sinus, 
round or blunt at the tip; the veins conspicuous, especially 
below, and the mid-vein continued into a brown cusp: pedun- 
cles axillary, two or three inches long, bearing cymes of five 
to ten light yellow flowers; _— of the inflorescence lance- 
Subulate, a line long; pedicels two or three lines long: calyx 
two lines high; the teeth lanceolate, with whitish scarious 
Margins, and covered with brown dots: corolla hardly an inch 
long, broadly cylindrical for two-thirds of its length and then 
gradually spreading to a limb half an inch or so across: sta- 
mens unequal, about half the length of the corolla-tube: style 
filiform; capsule obovate, three lines high. —Collected at 
2,000 to 3,000 feet altitude in the mountains near Zope- 
lote, Tepic, by Mr. Lamb, February 12, 1895 (no. 576). ‘. 
Ipomea Lambii, n. sp.—A slender vine, climbing fifteen 
feet over bushes and trees: the stem and branches covered 
with strongly reflexed tuberculate hairs: leaves broadly ovate, 
acuminate, varying in lengthfrom three to seven inches, two- 
thirds as broad as long; somewhat 3-lobed, or subhastate, 
