LUNDELL: THE GENUS PARATHESIS 61 
COSTA RICA.—Atasvxzta: Buissons a Santiago pres 8. Ramon, alt. 1000-1100 m., June 18, 
1901, Alberto M. Brenes 14388 (GH, K, US); Bois de Tremedal, pres San Ramon, alt. 1300— 
1400 m., Apr. 14, 1913, Adolfo Tonduz 17659 (US, type; F, K, LL, MICH, UC, isotypes); 
San Ramon, 1927, Alberto M. Brenes 5452 (F, LL, NY); Canton San Ramon, Barranca de S. 
Ramon, open forest, alt. 1000 m., Feb. 5, 1940, Austin Smith P2363 (A, US), shrub, erect, 
3 m., leaves chartaceous, dark opaque green, inflorescence dull cinnamon brown, ovary dull 
reddish, perianth pale greenish-yellow. InpEFINITE: M. Endres 231 (K). 
The very small flowers, short pedicels, combined with the uniformly stellate- 
hispidulous indument of the lower leaf surface well-mark the species. P. aeru- 
ginosa is perhaps closest to P. belizensis Lundell, which can be recognized by its 
larger flowers, the fine differences in indument, and ovary with scattered erect 
hairs apically. 
18. PARATHESIS TETRAMERA Bullock, Hooker’s Ic. Plant. 34, pl. 3398. 1939. 
Plate 9. 
Tree, 2 m. high, the apices of growing branchlets finely ferruginous-tomentose, 
entirely glabrous very early, punctate; leaves small, with slender petioles 3-10 
mm. long, the petioles glabrous, canaliculate; leaf blades oblong-elliptic, lanceo- 
late, or oblanceolate-elliptic, up to 7 em. long, 3 em. wide, apex acute, obtusish 
or acuminate, the base cuneate and decurrent on the petiole, margin entire, 
chartaceous, entirely glabrous but with leaf buds finely ferruginous-tomentose, 
pellucid-punctate, the costa elevated beneath, slightly impressed above, the 
lateral veins slender; inflorescences terminal, paniculate, up to 5 em. long, 
punctate, essentially glabrous; pedicels very slender, 5-8 mm. long, sparingly 
papillose-puberulent; flowers 4-parted, rarely 5-parted, corymbose or sometimes 
solitary, the calyx and corolla punctate, the corolla densely so in black lines; 
flower buds before anthesis slender, about 5.5 mm. long; sepals minute, triangu- 
lar, up to 1 mm. long, sparingly papillose-puberulent; petals united at base, 
linear-oblong, about 6 mm. long, narrowed above, obtuse, finely papillose- 
puberulent outside, short papillose-tomentose within over entire surface except 
at base; stamens about 4 mm. long; filaments thick, glabrous, black-punctate in 
lines, 2.5 mm. long; anthers erect, lanceolate, about 3.5 mm. long, narrowed to 
the obtuse apex, dorsifixed one-third above base, with a conspicuous black- 
punctate area above point of attachment, with occasional glands extending into 
lobes; ovary densely punctate, sparingly papillose-pubescent at apex and at 
base of style; the style slender, punctate in lines, up to 4.5 mm. long; placenta 
depressed-obovoid; ovules 8-10, uniseriate, enclosed; fruits red, globose, drying 
6 mm. in diam., the style persistent. 
MEXICO.—Guerrrero: Montes de Oca, Pasion, in woods, alt. 500 m., Oct. 8, 1937, Geo. B. 
Hinton 10779 (K, type; F, GH, LL, MO, US, isotypes), tree 2 m.; same locality, in oak forest, 
alt. 600 m., Oct. 6, 1937, Geo. B. Hinton 10769 (F, GH, LL, MO, US), tree 2 m., fruit red. 
A remarkable species, which is notable for its 4-parted, rarely 5-parted flowers, 
small glabrous leaves, small inflorescences, and large erect stamens. 
19. PARATHESIS oBTUSA Lundell, Wrightia 3: 83, fig. 52. 1963. Fig. 18. 
Small tree, 4 m. high, branchlets slender, at first tomentulose with fine stellate 
closely matted sessile hairs, glabrescent; leaves with short petioles up to 1 cm. 
long, the petioles at first papillose-puberulent above, tomentulose beneath; 
