GREENMAN. — MEXICAN PHANEROGAMS. Rete *) & § 
base), decurrent into a petiole, acute or short-acuminate, mucronate, cre- 
nate-serrate with mucronate teeth, cuneate at the base, thickish, conspic- 
uously véined, glabrous upon either surface or with a few scattered hairs 
on the midrib beneath ; petioles 8 to 20 mm. long, channelled above, usu- 
ally ciliate: inflorescence cymose or cymose-paniculate, few-headed ; pe- 
duncles 1 to 3 cm. long: heads about 1 cm. high, radiate; outer scales of 
the involucre about 14, spatulate, 4 mm. long, obtuse, ciliate, the inner 
lance-oblong, 6 to 7 mm. long, narrowed near the obtuse puberulent tip: 
ray-flowers sterile; achenes 3-angular, exaristate; rays oblong-obovate, 
2 cm. long, 8 mm. broad, white with yellowish nerves: disk-flowers nu- 
merous; mature achenes linear, 6 to 10 mm. long, longitudinally ribbed, 
glabrous or hispidulous on the angles especially towards the apex, 2—4- 
aristate. — Collected by C. G. Pringle on sand dunes near Tampico, State 
of Tamaulipas, 29 April. 1898, no. 6820. 
Bahia xylopoda, Perennial: stems decumbent, branching from the 
base : branches ascending, about 1.5 dm. high, more or less hoary-pubes- 
cent: leaves opposite or alternate, triternately compound, segments linear 
or subterete, obtusish, hirtellous-puberulent: heads radiate, about 1 cm. 
high, usually long-pedunculate, erect or nodding: involucral bracts sub- 
biseriate, the outer oblong, somewhat truncate, rounded or obtuse at the 
apex, the inner often more narrowed at either end and acutish, veiny 
With thinnish margins, grayish-white-pubescent on the outer surface with 
stipitate glandular hairs intermixed: ray-flowers fertile; ligules including 
the pubescent tube nearly or quite 1 cm. long; disk-flowers numerous; 
pappus usually of 8 narrowly oblong-obovate subequal scales, about 2 mm. 
long, cuneate at the base: corollas of the disk-flowers 4 mm. long, below 
pubescent on the outside: mature achenes 5 to 6 mm. long, hirtellous- 
pubescent above, canescent on the angles of the slender base. — Collected 
by C. G. Pringle, on bare hills above Pachuca, State of Hidalgo, altitude 
2,600 m., 30 July, 1898, no. 6931. ae 
This species is nearly related to B. Pringlei, Greenm., but is distin- 
guished readily by the longer achenes, narrower scales of the pappus, and 
also, according to Mr. Pringle, by the entire absence of running roots. 
Cacalia ampullacea. Stems 1 to 2 m. high, striate, purplish, pu- 
berulent: lower leaves petiolate, oblong-ovate, 2 to 3 dm. long, two 
thirds as broad, membranous, pubescent above, white-tomentose beneath, 
about 13-lobed, with rounded sinuses, the main lobes 6 cm. or less long, 
these again irregularly dentate-lobed ; stem leaves sessile, ovate-oblong, 
1 dm. or less long, 1 to 1.5 em. broad, strongly saccate below and sur- 
rounding the stem: inflorescence rather densely corymbose: peduncles 
VOL, xxx1vy. — 87 
