Plantae novae Texanae. 215 
most sessile, glabrous beneath, sparingly pubescent on the midrib above, 
and copiously ciliate with long white hairs, 2,5—7,5 cm long, and 
0,5 —2,5 cm wide; flowers in lateral, short, spike-like racemes from the 
upper axils; staminate flowers with a 3-lobed calyx and 3 stamens; 
pistillate flowers one or two at the base of the racemes, and with a 6- 
lobed calyx; capsule short-pedicelled, somewhat depressed, 8—10 mm in 
diameter, densely pubescent with long white hairs; seeds subglobose, 
3 mm long, smooth. 
Rocky woods on the Upper Hondo, central Texas. Summer. 
This very distinct and peculiar Tragia is not referable to any species 
known to me, but is most nearly related to T. urens L., from which it 
differs in being smooth, and in having few-flowered racemes, 3-lobed 
staminate calyces, and larger leaves. 
Specimens examined: Texas: The only specimens seen are those 
of the type, collected on the Upper Hondo, by J. Reverchon 1594, 
June, 1885. 
6. Lobelia puberula var. pauciflora B. F. Bush, |. c., p. 122. 
Stems 6—10 dm tall, simple, very slender, densely white-pubescent. 
Leaves elongated, oblong-lanceolate, entire or glandular-toothed, rather 
few on the stems; flowers few, 3 to 9, scattered along the stem, 2,5 to 
5 cm apart; sepals densely pubescent and bristly with long white hairs; 
corolla azure blue, about 3 cm long; tube more than twice as long as 
the sepals; hypanthium densely hispid with long bright white hairs. 
Sandy swamps near the coast, Florida to Texas. Summer and autumn. 
This is evidently related to L. puberula Michx., but differs conspi- 
cuously from that species in the taller, more slender, simple stems, longer 
leaves, and especially in the fewer flowers, which are much larger. 
Specimens examined: Texas: Swan, Reverchon 3206, September 17, 
1902, type. Florida: Without locality and date, Chapman. Louisiana: 
Without locality and date, Hale. 
7. Xanthium bubalocarpon B. F. Bush, I. c., p. 123. 
Stems very stout, much branched and spreading, about one meter 
tall. Upper part of the stem and the petioles very rough, covered with 
stout white papillae; petioles 5—15 cm long, stout; leaf blades broadly 
triangular, 8—20 cm wide, 3- to 5-lobed, dentate, very thick, rough- 
scabrous on both surfaces; burs pubescent, ovoid, clustered in the axils 
of the upper leaves, and in terminal racemose clusters, 2,5—4 cm long, 
including the short beaks, 2—3 cm wide, including the prickles, the 
short hispid beaks 6—8 mm long, nearly straight, hooked at the apex, 
equalling or a little shorter than the very dense subulate, slightly unci- 
nate prickles, which are about one-third as long as the diameter of the 
bur, and hispid nearly to the middle with yellowish-brown hairs, the 
prickles and the pubescence usually entirely concealing the body of 
the bur. 
Prairies and barrens, western Arkansas and eastern Texas, abundant, 
where it is called Buffalo Bur, whence the specific name. Autumn. 
