Part 1, 1918] RUBIACEAE 57 
22. Rondeletia villosa Hemsl. Diag. Pl. Nov. 27. 1879. 
Shrub, the young branchlets more or less villous; stipules ovate-lanceolate, acute, 1-2 em. 
long; leaves opposite, the petioles 4-15 mm. long, densely pilose, the blades oblong-elliptic or 
ovate, 10—25 cm. long, 4-9 cm. wide, acute at the base, acuminate or abruptly acuminate at the 
apex, green and sparsely pilose above, beneath long-pilose along the veins, arachnoid-tomentose 
between the veins with white hairs; inflorescence terminal and lateral, the flowers sessile or 
subsessile in dense few-flowered cymes, these arranged in narrow elongate spike-like panicles 
15-24 em. long; hypanthium densely tomentose; calyx-lobes 4, oblong, obtuse, unequal, longer 
than the hypanthium; corolla white, white-lanate outside, naked in the throat, the tube slen- 
der, 8-10 mm. long, the 4 lobes small, rounded, undulate; capsule subglobose, about 4 mm. 
in diameter, glabrate; seeds minute, angulate, punctulate. 
TYPE LOCALITY: San Pedro Nolasco, Oaxaca. 
DISTRIBUTION: Oaxaca, Chiapas, and Tabasco. 
23. Rondeletia buddleoides Benth. Pl. Hartw. 69. 1840. 
Arachnothryx buddleoides Planch. Fl. Serres 5: 442. 1849. 
Rondeletia affinis Hemsl. Diag. Pl. Nov. 28. 1879. 
Shrub, 1—1.5 meters high, the branches stout, terete or subangulate, brown, closely white- 
tomentose when young, glabrate in age; stipules lanceolate or oblong, 3-8 mm. long, obtuse to 
attenuate, erect, subpersistent, brown, tomentulose or glabrate; leaves opposite, the petioles 
stout, 3-6 mm. long, tomentose or glabrate, the blades oval-elliptic, elliptic-oblong, elliptic- 
obovate, or lanceolate, 5-12 cm. long, 1.8—5.5 cm. wide, obtuse to long-acuminate at the base, 
acute to abruptly long-acuminate at the apex, subcoriaceous, green above and sparsely pilose or 
glabrous, beneath densely covered with a very close white or fulvous tomentum, the costa 
slender, prominent, the lateral veins slender, 9-15 on each side, arcuate, ascending at an angle 
of 45°-60°, the secondary veins usually obscure; inflorescence terminal, the flowers sessile or 
subsessile in small dense short-pedunculate cymes, these arranged in a narrow spike-like panicle 
10-15 cm. long; bractlets linear, very small; hypanthium densely tomentose; calyx-lobes oblong 
or oval, obtuse, 1 mm. long or shorter, shorter than the hypanthium, spreading; corolla white- 
tomentose outside, the tube slender, 4-8 mm. long, hirsute within at the base, naked in the 
throat, the lobes rounded, 1—1.5 mm. long, undulate; style included or exserted; capsule oblong- 
globose, 3-4 mm. long, glabrate; seeds minute, punctulate. 
TYPE LOCALITY: Llano Verde, Oaxaca. 
DISTRIBUTION: Veracruz and Oaxaca to Panama. 
24. Rondeletia Thiemei Donn. Smith, Bot. Gaz. 42: 299. 1906. 
Shrub, the branches grayish-pilose; stipules triangular, subulate-acuminate, 3-4 mm. 
long; leaves opposite, subsessile, the blades lance-elliptic, 5-8 em. long, 2—2.5 em. wide, acute 
or acuminate at the base, acuminate or long-acuminate at the apex, membranaceous, scaberu- 
lous above, grayish-pilose beneath; inflorescence terminal, cymose-paniculate, the panicles 
sessile, narrow, thyrsiform, 5-6 cm. long, the pedicels 1-3 mm. long; bracts foliaceous, the 
bractlets linear, 4-6 mm. long; hypanthium pilose; calyx-lobes 4, unequal, one of them lance- 
olate, 5-6 mm. long, the others subulate; corolla pilose outside, the tube slender, 8-10 mm. 
long, the throat naked, the lobes rounded, 3 mm. long, glabrous; capsule globose, 5 mm. in 
diameter, pilose; seeds angulate, scrobiculate. 
TYPE LOCALITY: Rio Chamelecén, Santa Barbara, Honduras, altitude 400 meters. 
DISTRIBUTION: Known only from the type locality. 
25. Rondeletia rufescens B. L. Robinson, Proc. Am. Acad. 45: 402. 
1910. 
Rondeletia villosa f. strigosissima Donn. Smith, Enum. Pl. Guat. 2: 30; hyponym. 1891. 
Rondeletia rufescens ovata B. I,. Robinson, Proc. Am. Acad. 45: 403. 1910. 
Shrub, the branches stout, terete or subangulate, brown, densely ferrugino-villous when 
young, tardily glabrate; stipules triangular, 5-12 mm. long, abruptly long-acuminate or cus- 
pidate, erect, persistent, densely ferrugino-villous; leaves opposite, the petioles stout, 7-22 mm. 
