Trachylobium. | XLVII. § CHSALPINIEH (OLIVER). 311 
25. TRACHYLOBIUM, Hayne; Benth. et Hook. f. Gen. Pl. i. 583. 
Calyx-tube very short, turbinate, segments 4, subequal, or the two 
outer slightly shorter, much imbricate. Petals 5, subequal, all clawed 
with a rotundate or cordate lamina, or the two anterior minute, squa- 
miform. Stamens 10, free or very shortly coherent at base; anthers 
uniform, oblong, dehiscing longitudinally, versatile. Ovary shortly 
stipitate, surrounded by a hirsute ring at the base; style slender, gla- 
brous; stigma terminal, small; ovules usually 4-5. Legume oblong, 
ovoid or obovoid, stout, thickly coriaceous, coarsely verrucose, indehis- 
cent (or tardily dehiscent). Seeds 1 or 2, oblong or ellipsoidal, exal- 
buminous; the testa thickened internally at 4 equidistant points.— 
Large unarmed resinous trees. Leaves 2-foliolate; leaflets very ob- 
lique, coriaceous, obscurely glandular-punctate. Stipules early cadu- 
cous or obsolete. Flowers in terminal lax often straggling panicles, 
white or red. Bracts and bracteoles rotundate, concave, caducous. 
Possibly indigenous only in Tropical Africa and the Mascarene Islands, though quasi- 
spontaneous or cultivated here and there in Tropical Asia and the Archipelago. Very 
nearly allied to the American genus Hymencea, which differs in the form of the petals 
and legume. 
1. T. Hornemannianum, Hayne, Arzneigewachse, xi. t. 18. Wholly 
glabrous excepting the tawny- or silky-pubescent inflorescence ; extre- 
mities rather stout, terete. Leaflets unijugate, obliquely oblong or 
elliptical, shortly and obtusely acuminate or apiculate, outer margin 
at the base broadly rounded to the petiolule 1 or 2 lines below the base 
of the narrow upper edge, coriaceous, shining, the eccentric midrib 
prominent beneath, usually from 24—3} (or 4) in. long, 1-14 in. broad; 
petiole 4-1 in. Panicles usually overtopping the leaves, the minutely 
pubescent sometimes zigzag rachis giving off distichously lateral simple 
(or compound) racemes. Bracts caducous, concave, orbicular, 1-2 
lines broad; bracteoles similar. Pedicels very short, 1-3 lines. Calyx 
appressed-silky, segments obovate-elliptical or oblong, the inner very 
slightly longer. Petals posterior and lateral subequal, twice or half 
as long again as the calyx, lamina rotundate, abruptly or cuneately 
narrowed into the distinct claw which exceeds the lamina in length ; 
2 anterior petals squamiform, 1 line or less. Filaments glabrous, very 
slightly connate at base. Ovules 4 or 5. Legume 1- or 2-seeded, stout, 
oblong or obovoid, very obtuse, 14-2 in. long, #-1} in. broad, 2 in. 
thick, very coarsely resinously warted often with intermediate smaller 
ewes Seeds 4-3 in. long, thickly oblong.—7. Gertnerianum, Hayne, 
1.c.t.19 (no doubt from a garden in Java); Z. mossambicense, Klotzsch 
in Peters’ Mossamb. Bot. 21, t. 2. 
Mozamb. Distr. Zanzibar, Dr. Kirk! Rovuma Bay (leaf only), Dr. Kirk! 
Querimba, Dr. Peters! 
This tree affords part if not all of the Copal of East Tropical Africa. It is very closely 
allied to T. verrucosum (Hymenea verrucosa, Gert. de Fruct. ii. 306, t. 139, fig. 7,) 
of Madagascar. Almost the only difference which I can discover between the species 
is in the petals; in 7. verrucosum the anterior petals nearly equal the rest, and are dis- 
