108 TEXAS RESEARCH FOUNDATION: CONTRIBUTIONS, VOLUME 5 
Orbignya, Brosimum, Calophyllum, Licania, Psidium, abundant in wet forests elev. 300- 
350 m., Sept. 19-20, 1960, Rogers McVaugh 19160 (LL, MICH), treelike, to 8 m. high, flowers 
pink. 
The long slender anthers suggest P. columnaris, and its leaves have similarities 
to P. prionophylla Standl. It is at once recognizable from both of these by the 
finer strictly appressed pubescence of the undersurface of the leaves. Although 
the leaf blades are predominantly crenulate, they are sometimes rather coarsely 
crenulate-dentate, suggesting P. prionophylla in this respect. The fruits are 
often infested by insects, and gall-like. 
38. PARATHESIS ROSEA Lundell, Wrightia 2:72. 1963. Fig. 37. 
Shrub, up to 3 m. high, the twigs rather stout, tomentose with brownish, 
fine stellate, appressed hairs; leaves with stout petioles 7-14 mm. long, canali- 
culate, glabrescent above; leaf blades oblong-elliptic, 10-17 cm. long, 3.2-6.5 
cm. wide, apex subabruptly acuminate, base cuneate and decurrent on petiole, 
chartaceous, paler beneath, pellucid-punctate, thinly pubescent on lower sur- 
face with very fine closely appressed stellate hairs, glabrescent in marginal zone, 
the margin irregular but essentially entire ; inflorescences terminal, broadly 
pyramidal, up to 15 em. long, finely and sparingly brown-tomentose; flowers in 
corymbs, short villous; pedicels slender, 3-5 mm. long; flower buds at anthesis 
ovoid, about 6.5 mm. long, the calyx and corolla black-punctate, the corolla in 
lines; sepals 1.5-2 mm. long, acuminate ; petals linear-lanceolate, about 7 mm. 
long, papillose-tomentose within above middle and along edges; stamens erect, 
3 mm. long; filaments stout, about 1.7 mm. long, glabrous; anthers ovate- 
lanceolate, about 2.2 mm. long, acutish, dorsifixed, with a small triangular black- 
punctate area at point of attachment, the lobes spreading at base; ovary pubes- 
cent apically; the style slender, about 4.5 mm. long, with scattered erect hairs on 
basal third; placenta depressed-globose; ovules 6, erect, uniseriate, enclosed. 
MEXICO.— Jauisco: Sierra del Halo, near a lumber road leaving the Colima highway 7 
miles south-southwest of Tecalitlan and extending southeasterly toward San Isidro, steep 
slopes in pine-oak forest, 2-5 miles from the highway, abundant in barranca, elev. 1400-1500 
m., June 23, 1957, Rogers McVaugh 15021 (LL, type; MICH, isotype), shrub to 3 m. high, 
flowers dull pink, fruit red. 
A Nee collection from Acapulco (F) may be referable here. 
39. PARATHESIS RETICULATA Lundell, Wrightia 2:71. 1963. Fig. 38. 
Small tree, up to 5 m. high; branchlets stout, ferruginous-tomentose with fine 
closely appressed stellate hairs; leaves with marginate petioles up to 2 em. long, 
the petioles finely tomentose beneath, canaliculate; leaf blades elliptic, oblanceo- 
late or obovate-elliptic, 10-25 cm. long, 4.5-9 cm. wide, apex subabruptly 
acuminate, base narrowed, acute and decurrent, membranaceous, black-punc- 
tate, drying brown and slightly paler beneath, bizonal, pubescent on lower 
surface with fine appressed stellate ferruginous hairs, the marginal zone glabres- 
cent, the margin rather obscurely crenulate, the costa stout and elevated be- 
neath, the lateral veins slender but conspicuous on undersurface, prominently 
reticulate-veined, sometimes areolate; inflorescences terminal, tripinnately 
paniculate, up to 20 em. long, ferruginous-tomentose with fine appressed stellate 
