54 NORTH AMERICAN FLORA [VOLUME 32 
white-tomentose outside, the tube stout, 5.5-7 mm.long, glabrous in the throat, the 4 lobes 
rounded, 2 mm. long, undulate; anthers sessile, included; capsule 3.5-4 mm. broad, didymous- 
globose, densely white-tomentose; seeds minute, pale-brown, angulate. 
Type Locality: Hacienda Las Pilas (Cerro Espino), Oaxaca, altitude 400 meters. 
DISTRIBUTION: Known only from the type locality. 
14. Rondeletia leptodictya B. L. Robinson, Proc. Am. Acad. 45: 402. 
1910: 
Shrub, 2 meters high, the branches slender, terete, reddish-brown, thinly white-tomentu- 
lose whan young, but soon glabrate; stipules linear-lanceolate, 5—10 mm. long, erect, persistent, 
long-attenuate, thin, brown, pilose on the margins; leaves opposite, the petioles slender, 5-12 
mm. long, tomentose or glabrate, the blades broadly obovate to elliptic-oblong, 4-11 cm. long, 
1.5—5 cm. wide, acute or obtuse at the base, abruptly acute to attenuate at the apex, with an © 
acute tip, thin, green on the upper surface and thinly villosulous, finely reticulate, beneath 
loosely white-tomentose when young, glabrate in age, the costa prominent, the lateral veins 
7-10 on each side, very slender, ascending at an acute angle; inflorescence terminal, the pe- 
duncles slender, 4-6 cm. long, the flowers numerous, sessile in a dense globose head; hypan- 
thium globose, densely white-tomentose; calyx-lobes 4, subequal, linear-oblong or oblanceolate, 
2 mm. long, obtuse, tomentulose outside, sericeous within, spreading or reflexed in age; corolla 
blood-red, the tube very slender, 12-14 mm. long, thinly arachnoid-tomentose outside, glabrous 
in the throat, the 4 lobes oblong, obtuse, 3-4 mm. long, spreading; style exserted. 
TYPE LocaLity: Banks of the Rio Petatlan, near the boundary between Michoacan and Guer- 
rero, at an altitude of 500 meters. ; 
DISTRIBUTION: Known only from the type locality. 
15. Rondeletia leucophylla H. B. K. Nov. Gen. & Sp. 3: 395. 1820. 
Rondeletia elongata Bartl.; DC. Prodr. 4: 409. 1830. 
Bouvardia discolor H. & A. Bot. Beech. Voy. 428. 1840. Not Rondeletia discolor H.B. K. 1820. 
Arachnothryx elongata Planch. Fl. Serres 5: 442. 1849. 
Rondeletia dubia Hemsl. Diag. Pl. Nov. 28. 1879. 
Rondeletia leucophylla calycosa Greenman, Proc. Am. Acad. 39: 92. 1903. 
Shrub, about 1 meter high, the branches slender or stout, brown or reddish-brown, densely 
pilose or white-tomentose when young; stipules triangular-lanceolate or lance-subulate, 5-12 
mm. long, attenuate, erect, persistent, thin, brown, pilose outside; leaves opposite, the petioles 
stout or slender, 2-20 mm. long, densely pilose or tomentose, the blades ovate, elliptic-oblong, 
lance-oblong, or narrowly lanceolate, 3-14 cm. long, 1-6 cm. wide, acute to broadly rounded at 
the base, acute to attenuate at the apex, thin, green above and densely pilose, beneath densely 
white-tomentose, with a loose tomentum, this sometimes deciduous in age, the lower surface 
then pilose, the costa prominent, the lateral veins slender, 6-10 on each side, subarcuate, as- 
cending at an angle of about 45°; inflorescence terminal and axillary, cymose-paniculate, pedun- 
culate, densely many-flowered, 4-6 cm. long and broad, the flowers sessile or subsessile; bracts 
elongate, linear-attenuate; hypanthium white-lanate and pilose; calyx-lobes 4, linear or ob- 
long-linear, 3-6 mm. long, unequal, acute or attenuate, erect or spreading; corolla red, white- 
tomentose outside, the tube stout, 8-16 mm. long, naked in the throat, the 4 lobes oblong 
or rounded, 4-6 mm. long rounded at the apex, spreading; anthers short-exserted, yellow; 
capsule subglobose, 3 mm. long, densely white-tomentose ard pilose; seeds minute, angulate, 
pale-brown. 
TYPE LOCALITY: Between Alto del Peregrino and Rio Papagallo, Guerrero. 
DISTRIBUTION: Sinaloa and Jalisco to Oaxaca. 
ILLUSTRATION: H. B. K. Nov. Gen. & Sp. pl. 290. 
16. Rondeletia aspera Standley, sp. nov. 
Branches stout, brown, pilose when young with short ascending hairs; stipules linear to 
oblong-lanceolate, 6-9 mm. long, erect, subpersistent, thin, brown, strigose outside; leaves 
opposite, the petioles stout, 5-10 mm. long, densely short-pilose, the blades oblong-elliptic to 
lance-oblong, 6-10 cm. long, 2—4.2 cm. wide, acute or acuminate at the base, acute or acutely 
short-acuminate at the apex, membranaceous, green above, very scabrous with short slender 
