164 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
back. Pedicels 12 to 14 mm. long, hairy. Sepals 5 (3+2), ovate, rounded at tip, 
7 mm. long, conchoid, greenish or greenish white, hairy on the back except on the 
covered margins. Stamens 32 to 34; filaments 3.5 mm. long, glabrous or sparsely 
hairy; anthers elliptic or ovate-elliptic, nearly 2 mm. long, slightly emarginate at the 
base, obtuse at the tip, fixed halfway between the base and the middle and versatile. 
Pseudostaminodes (interspersed with the stamens or perhaps forming an outer circle) 
34 to 42, stout, about 2 mm. long, clavate, sparsely covered with long hairs and more or 
less emarginate at tip. Pistil 3 mm. long, densely hairy except on the stigmatic 
surface; ovary rounded-ovoid, 1-celled, the numerous pedicellate ovules obpyriform 
and inserted on 3 parietal placentas; stigma sessile. 
Fruit berry-like; peduncle 1.5 to 2 cm. long, hairy, surmounted by the persistent 
calyx; berry globose, shallowly 3-sulcate, about 3.5 cm. in diameter, yellowish green 
outside; mesocarp soft, juicy; endocarp like a 3-valved, coriaceous capsule. Seeds 
numerous, obovoid, angular, about 4 mm. long. 
Type in the U.S. National Herbarium, no. 676846, collected on hills between Rio 
Grande and Pedro Vidal, Canal Zone, on the road to Arraijan, altitude about 120 
meters, flowers and young fruits, February 11, 1911, by H. Pittier (no. 2710). 
Panama: (Besides type collection) near Pinogana, southern Darien, fruit, April, 
1914 (Pittier, photograph); also around Matias Hernandez, near Old Panama (Pittier). 
Specimens of Fendler (no. 318), collected at Chagres, and of 8. Hayes, from Parafso, 
neither of which I have seen, have been identified with the type of the genus, Zuelania 
laetioides A. Rich., from Cuba and Jamaica. It is more likely, however, that they be- 
long to the new species here described, which differs from the above by the obtuse and 
versatile anthers and the hairy, clavate pseudostaminodes. From Z. crenata Griseb. 
it is distinguished by the larger flowers and the villous ovary. 
The wood of our species, which will be described in another paper, contains an 
abundant transparent and inodorous resin. At the time of its bloom the bare crowns 
of this tree are easily detected from far off, as they form white spots on the dark green 
background of the forest. 
EXPLANATION OF PLATE 79.—Leaves and fruit, southern Darien. From the Pittier specimen of April, 
1914, after being photographed preserved in alcohol. Natural size. 
Oncoba laurina (Presl) Warb. in Engl. & Prantl, Pflanzenfam. 3°: 19, 1894, 
FIGure 89. 
Lindackeria laurina Presl, Rel. Haenk. 2: 89. pl. 65. 1830. 
Mayna laurina Benth. Journ. Linn. Soc. Bot. 5: Suppl. 2. 
81. 1861. 
A tree 12 to 15 meters high, the trunk 30 to 35 cm. in diameter, 
with radiate branching beginning about 3 meters above the 
ground, and a pyramidal crown. Bark gray, more or less shaggy. 
Branchlets striate, smooth. 
Leaves alternate, petiolate, entirely glabrous, or subpuberu- 
lent beneath. Petioles 6 to 9 cm. long, narrowly sulcate, sub- 
terete. Leaf blades oblong-lanccolate, 12 to 28 cm. long by 
6 to 9.5 cm. broad, subacute at the base, acuminate, olive- 
green and almost shiay above, paler beneath; nervation little 
prominent abave, more so on the lower face; primary veins 
distant and anastomosing along the entire margin. Stipules 
none or early caducous. 
Fig. 89.—Oncobalaurina, Inflorescence terminal, racemose, simple or branched at the 
a, Petal; b, stamens; c, base, few-(2 to 10-)flowered, glabrous, shorter than the leaves. 
pistil. Scale 3. Peduncles shorter than the petioles; rachis more or less angu- 
late. Pedicels 0.5 to 1.5 mm. long, slender. Sepals 5, elliptic or 
ovate-elliptic, 7 mm. long, rounded or subacuminate at tip, subpubescent on the 
back. Petals 5, narrowly elliptic, about 10 mm. long and 3.5 mm. broad, white. 
Stamens 28, free or scarcely connate at the base, glabrate, 5.8 mm. long; filaments 
