644. XCIV. APOCYNACEX. (J. D. Hooker.) . . [Dyera. 
the left. Stamens 5, in the middle of the tube, included, filaments very 
short; anthers oblong, obtuse, upper half empty fleshy, base obtusely 2-lobed. 
Dise annular, obscure. Ovary short, broadly conie, obtuse, top pubescent, 
2-celled, cells many-ovuled; style O, stigma 2-cleft, minute, sessile, pyriform, 
lobes appressed. Follicles very large long thick, straight, cylindric, obtuse, 
connate at the base, reflexed, furfuraceous, Seeds (unripe) flattened, winged.— 
Species 3, Malayan. 
l. D. costulata, Mook. f.; leaves rounded at the base, cymes shortly 
peduneled, corolla-lobes about as long as the tube. Alstonia P costulata, 
Miquel Fl. Ind. Bat. Suppl. 556. 
Maracca; Griffith, Maingay (Kew Distrib. 1097).— Disrnrp. Sumatra, 
A tree; branches very stout. eaves 6-8 in a whorl, 2-4 by 13-3 in., broadly 
elliptie or oblong, rounded at both ends, hard and coriaceous, shining above, glaucous 
beneath; nerves 12-16 pairs, strong, nearly straight, almost horizontal or ascending, 
reticulations prominent above; petiole 3-1 in. Cymes numerous, twice umbellately 
branched, glabrous; peduncles 2-3 in.; pedicels short; flowers very small. Calyx- 
lobes rounded, coriaceous. Corolla-tube Jo in. long, glabrous, lobes linear-oblong. 
Follicles 9-12 by 1-14 in., “ covered with minute crenated ferruginous squamule” 
(Maingay).—A most remarkable plant, evidently allied to Alstonia, though from the 
seeds being imperfectly known, its exact affinity cannot be stated. The huge follicles 
are borne on a woody peduncle nearly } in. diam., their bases are entirely connate, and 
though quite straight they are sharply deflexed, when ripe they gape wide, and the 
inner shining parchment-like coat becomes irregularly torn, forming a fringe to the 
coriaceous outer. An allied species from Borneo, collected by Low, Lobb, and 
Beccari, has longer leaves (6-9 by 1-2 in.) with the base narrowed into the petiole 
and numerous (20-30) pairs of nerves, —All the species are said to yield gutta Jelatong. 
9. D. laxiflora, Hook. f., leaves narrowed to the rounded or subacute 
base, cymes long peduncled, corolla-lobes four times as long as the tube, 
SINGAPORE ; Murton, Cantley. 
Closely allied to D. costulata, but with much larger leaves, sometimes 8 in long, 
petioles 14-2 in. Peduncles of cyme very slender, 3-ő in., pedicels 3-3 in. Corolla- 
lobes linear, A in. long. 
18. HOLARRHENA, Dr. 
Trees or shrubs. eaves opposite, membranous. Flowers white, in terminal 
or subaxillary many-flowered corymbose cymes. Calyx 5-lobed or -partite, 
usually glandular within, lobes small, Corolla salyer-shaped, tube slender 
cylindric, throat contracted naked; lobes oblong, overlapping to the left. 
Stamens near the base of the tube ; anthers oblong-lanceolate, mucronate, cells 
rounded at the base. Disc 0. Carpels 2, distinct ; style short, filiform, stigma 
oblong-fusiform, top entire or 2-toothed ; ovules many in each carpel. Follicles 
2, elopgate, spreading and incurved, terete. Seeds linear or oblong, compressed, 
concave, tipped with a deciduous coma; funiele in the concavity, albumen 
scanty; cotyledons broad, complicate, radicle short, superior.—DisrRiB, Species 
7 or 8, tropical Asiatic and African. 
l. H. antidysenterica, Wall. Cat. 1672; glabrous pubescent or to- 
mentose, leaves shortly petioled elliptic oblong ovate or ovate-oblong obtusely 
acuminate. A. DC. Prodr. vii. 418; Brand. For. Fl. 326, t. 40; Bedd. Fi. 
Sylv. Anal. Gen. xx. fig. 6; Kurz For. Fl. ii. 182: Dalz. & Gibs. Bomb, Fl. 145; 
Beddome For. Fl. Anal. Gen. 160, t. 20, fig. 6. H. Codaga, G. Don Gen. Syst. 
iv. 78; A. DC. Le: Kurz For. Fl. ii. 183; Wight Ic. 1297. H. pubescens, 
Wall. Cat. 1673; A. DC. Le. H. malaccensis, Wight Ic. t. 1298. — Echites 
antidysenterica, Roxb. Wrightia antidysenterica, Grah. Cat. Bomb. PI. 114, 
exci. some syns. Chonemorpha? antidysenterica, G. Don Ze: Wight Ie. t. 
