a4 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. 
This species and the next are very closely allied; and, working on Herbarium 
materials alone, I would have united them. My friend Dr. H. Trimen, the distinguished 
Director of the Botanic Garden at~Peradeniya, who has had the advantage of seeing 
both plants growing, and who has worked with fresh material, on being appealed to by 
me remarked as follows:—‘‘ Unona elegans and Zeylanica are near enough as species, but 
they are, I think, distinct. U. eleguns is a larger shrub, with larger flowers; its leaves 
are only 8 to 5 in. long, and the ripe carpels are markedly constricted between the 
seeds and finely hairy. U. Zeylanica has much larger leaves (7 to 9 in. long), and 
the ripe carpels are glabrous (slightly rough, however) and very little constricted 
between the seeds. But,” he adds, “of course these characters are comparative, not 
contrasted.” | a 
Prare 69. Unona. elegans, Thwaites. 1, Flowering branch; 2, fruit nearly ripe; 
8, flower dissected—of natural size ; 4 & 5, anthers—enlarged. 
2. Unona Zeyvzanica, Hook. fil. & Th. Fl. Ind. 132. A small shrub 3 to 6 feet 
high; young branches slender and with pale brown, warted and much striate, glabrous 
bark. eaves thickly membranous, oblong-lanceolate, acute, or shortly and rather obtusely 
acuminate, the base cuneate; upper surface shining, glabrous; the lower glaucous, 
with very small black dots and minute reticulations bearing extremely minute dark- 
coloured hairs; length 65 to 8°d in., breadth 1-4 to 19 in.; petiole °3 in., smooth. Flowers 
axillary, solitary, 1 to 1°25 im. long; pedicels slender, nearly °5 im. long, and with 
1 or 2 minute deciduous bracts-near the base.. Sepals small (-2 in. long), ovate-lanceolate, 
puberulous. Petals thinly coriaceous, oblong-lanceolate, rather obtuse, glabrous; the inner 
rather shorter. Ltipe carpels stalked, glabrous, only slightly granular, about °75 in. long, 
usually 2- but sometimes 3-seeded, slightly constricted. Beddome Ic. Pl. Ind. Ofte bes» 
Hook, fil. Fl. Br. Ind. i. 58; Thwaités Enum. 9; C. P. 1037. 
Ceylon: im the Central Province, ascending to 3,000 feet. 
Prate 70. Unona Zeylanica, Hook. jil. § Thoms. 1, Flowering branch; 2, ripe fruit; 
3, flower seen irom above; 4, flower dissected—of natural size; 5, andro-gyncecium ; 
6, pistils after the stamens have been removed;. 7 & .8,. anthers ;. 9, pistil—enlarged. 
(Nos. 5 to 9 are copied from a drawing kindly lent me from the Herbarium of _ the Royat 
Botanic Garden, Ceylon, by my friend Dr. H. Trimen, rns.) 
8. Unona Duwatu, Wall. Cat. 6425. -A climber 60 to 100 feet long; young 
branches slender, rather pale, sub-rugose, lenticellate, glabrous. Leaves thickly membranous, 
pale when dry, elliptic-oblong to oblong-lanceolate, acute or shortly acuminate, the 
base rounded; the upper surface glabrous, shining; the lower slightly glaucous, sometimes 
with a few scattered hairs on the midrib; main nerves 10 to 12 pairs, spreading, not 
prominent; length 3 to 4 m., breadth 1:2 to 1°75 in.; petiole -2 in. Flowers axillary, 
solitary, 1:25 to 1-4 in. long; pedicels °35 to °5 in. long, slender, pubescent, with a minute 
bracteole about the middle. Sepals broadly ovate, acute, puberulous, reflexed, °25 to 
3 in. long. Petals narrowly oblong-lanceolate, sub-acute, puberulous to glabrous, 1 to 
1°25 in long; the inner row smaller. Ripe carpels numerous, stalked, glabrous, constricted 
between the 3 to 5 ovoid joints, 1:25 to 1:75 in. long; the stalks about 1 inch. ook. 
