334 NEW OR NOTEWORTHY BORNEAN PLANTS. 
BEGONIACEAE. 
Begonia Linnaeus. 
Begonia angustilimba sp. nov. § Petermannia. 
Herba erecta, suffruticosa, 40—90 cm. alta, partibus junioribus: 
perspicue ciliatis; foliis numerosis, chartaceis, anguste lanceolatis, 
10—16 cm. longis, 1-—3 cm. latis, acuminatis, basi abrupte rotun- 
datis, leviter cordatis, symmetricis vel leviter inaequilateralibus, 
margine irregulariter serrato-dentatis spinulosisque; stipulis per- 
spicuis, subpersistentibus, 1.5—2 cm. longis, oblongo-lanceolatis, 
tenuiter acuminatis; floribus axillaribus, plerumque solitariis, ¢ 
sepalis 2, obovoideis, 8—10 mm. longis; petalis 0, pedicelis 1.5—2 
cm. longis; @ breviter pedicellatis; capsulis aequaliter 3-alatis, 
circiter 8 mm. longis, 11 mm. latis, basi rotundatis, apice subacutis, 
omnibus partibus perspicue longe ciliatis vel ciliato-setosis. 
An erect, simple or sparingly branched, suffrutescent plant, 
40 to 90 em. high, the younger parts rather prominently ciliate with 
elongated, spreading, brownish hairs, the older stems and branches 
glabrous, brown, rugose, about 3mm. in diameter. Leaves numerous, 
chartaceous, narrowly lanceolate, greenish-olivaceous when dry, 
shining, the lower surface paler than the upper one, both surfaces 
sparingly ciliate on the midrib and nerves, or the upper surface glab- 
rous, straight or somewhat faleate, shehtly inequilateral, 10 to 16 
em. long, 1 to 2m. wide, the apex ee slenderly acuminate, base 
rather abruptly rounded, shghtly cordate, equilateral or somewhat 
inequilateral, the mar&in irregularly toothed and spinulose im the 
upper part, the teeth obscure or wanting in the lower part; lateral 
nerves sharply ascending, about 5 on each side of the midrib, 
slender, distinct ; petioles ciliate, 2 to 4 mm. long; stipules rather 
thin, 1.5 to 2 em. long, oblong-lanceolate, slenderly acuminate, some- 
what ciliate, subpersistent. Flowers axillary, s solitary or in pairs, 
white. Staminate flowers: sepals 2, obovate, rounded, sparingly 
ciliate 8 to 10 mm. long, 6 to 8 mm. wide. Petals none. Stamens 
about 35, the anthers oboyoid to oblong-oboyoid, 1 mm. long, equal- 
about 35, the anthers ovoid to oblong-obvoid, 1 mm. long, equalling 
ling the filaments in length. Pedicels slender 10 to 12 mm. long, 
elabrous or very slightly ciliate, Pistillate flowers axillary, solitary, 
their pedicels about 2 mm. long. Sepals 3, elliptic-ovate, subacute, 
6 to 7 mm. long, sparingly ciliate. Capsules equally 3-winged, about 
8 mm. long, 11 mm. wide, rounded at the base, the apex subacute, 
the outer upper angles of the wings subacute or rounded, all parts 
of the capsule, including the wings, prominently ciliate with elong- 
ated, spreading, purplish or brow nish setae 2 to 3 mm. in length. 
_ British North Borneo, near Sandakan, Ramos 1388, Octoser, 
1920. On cliffs and boulders along streams at low altitudes. A 
species strongly characterized by its narrow, elongated, often some- 
what falcate “leaves, its persistent large sepals, its axillary solitary 
Peery and its conspicuously setose-cilate capsules. 
Jour. Straits Branch. 
