STANDLEY—STUDIES OF TROPICAL AMERICAN PHANEROGAMS. 457 
other species except C. tomentulosa, being of nearly uniform width for two- 
thirds their length, then tapering to the apex. 
EXPLANATION OF PLATE 29.—Specimen of Cobaea pachysepala, Mazon & Hay 3747. 
Seale 4. 
14, Cobaea tomentulosa Standley, sp. nov. 
Stems stout, obscurely tomentulose except about the nodes, there tomentose ; 
petioles stout, abundantly tomentulose; leaflets narrowly oblong to lance-oblong 
or elliptic, 5 to 9 em, long, 25 to 30 mm. wide, acute, mucronate, rounded or 
subcordate at the base, dull green, sparsely puberulent on the upper surface, 
loosely villous beneath with rather short hairs, on petiolules 7 to 14 mm. long; 
peduncles stout, solitary, 22 to 24 cm. long, at first straight and erect, curved 
or coiled in age, sparsely puberulent; calyx segments united only at the base, 
20 to 25 mm. long, lanceolate to narrowly oblong, acuminate, thick, densely 
tomentulose outside and along the margins within; corolla 55 to 60 mm. long, 
truncately obconic, villous outside, glabrous within, yellow, the lobes about half 
as long as the tube, rounded-ovate, obtuse; stamens only slightly surpassing the 
corolla, the filaments villous, densely so at the base, the anthers yellow, § mm. 
long; style slightly exserted, the stigmas thick, 3 mm. long; capsule oblong- 
elliptic, 55 mm. long, acutish, glabrous; seeds 4 to 6 in each cell, about 2 cm. 
long. 
Type in the U. S. National Herbarium, no. 250869, collected near Zunil, 
Guatemala, altitude 2,340 to 2,400 meters, January 20, 1896, by E. W. Nelson 
(no. 36838). 
Similar in general form to the preceding species, but distinguished by the 
densely tomentulose calyx and the villous leaflets of slightly different outline on 
longer petiolules, 
15. Cobaea biaurita Standley, sp. nov. PLATE 30. 
Stems slender, glabrous; leafiets glabrous, green, slightly paler beneath, 
rather abruptly acute or acuminate, mucronate, the lowest pair subsessile, 
elliptic or narrowly oval, constricted above the base, with 2 rounded unequal 
basal auricles, the upper leaflets oval, unequal and rounded to acutish at the 
base, on petiolules 5 to 7 mm. long; peduncles stout, solitary, about 20 cm. long ; 
calyx lobes united for only a short distance at the base, broadly oblong-ovate, 
about 3 cm. long, 13 to 15 mm. wide, rather abruptly narrowed to a triangular- 
subulate tip, green, glabrous outside, densely puberulent within; corolla 6 cm. 
long, 2.5 cm. wide above the base, sparsely villous-puberulent outside, the lobes 
less than half as long as the tube, broadly rounded; stamens slightly exserted, 
the anthers about 8 mm. long; style exserted about 2 cm., the stigmas stout, 
2 mm. long; fruit not seen. 
Type in the U. 8S. National Herbarium, no. 233329, collected near Tambala, 
Chiapas, Mexico, altitude 1,200 to 1,650 meters, October 20, 1895, by E. W. 
Nelson (no. 3363). 
Nearest Cobaca scandens, but distinguished by the green foliage, differently 
shaped leaflets, and very different calyx lobes, which are united for only a 
short distance at the base. In (C. scandens the calyx segments are broadly 
rounded at the apex and mucronate. The plant is said to be a vine 4.5 to 6 
meters high, with greenish flowers. 
EXPLANATION OF PLATE 30.—Type specimen, Scale %, 
16. Cobaea pringlei (House) Standley. PLaTE 81. 
Rosenbergia pringlei House, Muhlenbergia 4: 24. 1908. 
TPE LOCALITY: In the Sierra Madre near Monterey, State of Nuevo Leon, 
Mexico. Type collected by Pringle (no. 11901), August 29, 1903. 
RANGE; Known only from type collection. 
