C Leaves opposite, ... ••• ••• ••• ••• ••• 19
£ _____ ternate, sessile, very rough, flowers 4-androus, ... ... ...
f Flowers pentandrous, ... ... ••• ••• %
£ ------- - tetraadrous, ... ... ••• . ••• ••• ••• •••
c Upper leaves reduced in size, scarcely altered in form, ... ...
i ____reduced in size and conspicuously altered in form, ... ...2 2
/ Stem very ramous, 4-angled, leaves sub-sessile, narrow lanceolate cordate,
\ pubescent beneath,
1 Sparingly branched: leaves ovato-lanceolate acute, pilose on both sides,
I coriaceous, scabrous, . .,
(F ru it often 3-winged; leaves short oval or cordate, ovate, prickly hispid
30 J
on the margin, , . 23
- 2-winged: leaves long linear lanceolate, glabrous, except a line or
v hairs on the margin,
( Stems very ramous, straggling or climbing among bushes, 24
>_____ procumbent: middle wing of the fruit often thickened or spongy,
(Stem very ramous: leaves hispid on the margin, sessile, cordate: middle
1 wing of the fruit sometimes thicker than the others,
. ramous; leaves oval short-petioled, glabrous except the margin, floral
, ones linear acute, ...
C Upper leaves much reduced in size, cordate, ... ••• ••• 26
■ { -------- ovate or sub-cordate lanceolate, ... ... ... ••• 28
r C Leaves sparingly pilose, roughish above, ... ... ••• — 27
-------- tomentose beneath, hispid above, ... , ... •••, ,
(Leaves sessile, sub-cordato-truncate, oblong lanceolate, acute, glabrous;
l floral ones very small, .
7 -j_____ ovate lanceolate, acuminate, slightly hispid: fruit orbicular, deeply
H C Leaves scabrous above, villous beneath, ... ... ... ... 29
8 ^ --------- hispid towards the margin, smoother on the disk, ... ... 31
f Fruit wingless, ... ... , ••• , , ••• .••• I H 30
9 ) _____ ribbed and winged, leaves ovate lanceolate sub-falcate: stem terete,
/ pubescent,
(Leaves short, broad ovate, rounded at the base, acute, stem roughly tomentose:
floral leaves lanceolate,
• ovate oblong lanceolate, roundish or sub-cordate at the base: floral
I leaves narrow lanceolate,
f Leaves lanceolate acuminate, tapering at both ends, upper ones narrow
31 3 lanceolate, fruit wingless,
/ --------- ovate lanceolate acuminate, fruit 3-winged or simply ribbed,
(Leaves opposite triplici-nerved, i. e., all the three primary nerves branched
1 (some of them are somewhat 5-nerved a t the base), _ 33
■j •— usually alternate quintuple-nerved, i. e., the middle primary nerve
( twice branched: (the lateral ones are secimdly branched), f... 34
<,o C Inflorescence cymose fruit sessile, wingless,
£ -------- glomerulate, sessile: fruit imperfectly winged,
34 C Male flowers pentandrous, ... ... ... ••• ••• ... 35
V — ■„ ..’t- tetrandrous, ... ... ... ... 43
„fe J Fruit wingless, leaves alternate, ... ... ... — ...3 6
1 _____ - 4-angled more or less perfectly, 4-winged; leaves sometimes opposite, 38
3g i Leaves lanceolate acute at both ends, ... g ... ... ... ...3 7
( --------- broadly ovate at the base or sub-orbicular, ... ... ...
C Leaves elliptic, hispid above, pubescent beneath, fruit ovate slightly ribbed,
37 <_____ broad ovato- lanceolate, smooth above, downy beneath, fruit somewhat
( compressed with a thickened margin,
C Fruit imperfectly 4-winged, calyx prolonged into a short beak or apiculus, 39
38 -J-------- distinctly 4-winged, beaked; leaves longish petioled, broad ovate, mem-
C branous,
oq j Procumbent, diffuse: leaves opposite or sub-alternate, subsessile, 40
i Erect or ascending: leaves alternate, petioled, elliptico-lanceolate or ovate, 41
(Leaves crowded,alternate, ovate, bluntish,pilose, small: fruit deeply furrowed,
40 3 -------- opposite broadly ovate sub acute, pilose; fruit prominently ribbed
( and imperfectly winged,
, rFruit imperfectly 4-winged; wings truncated, 42
\ -------- winged, wings sub-orbicular, enlarging above, auricle-like,
f Leaves ovate or ovato-lanceolate obtuse, rounded at the base, ramous,
42 ■<-------- subtriplici-nerved, lanceolate, acute at both ends, at first nearly smooth,
C becoming scabrous, villous beneath, ... ... ...
( Leaves entire on the margin, ... ... ... ... ... 44
43 ( -------- serrated, shrubby, ... ... ... ... ...
( Leaves alternate, ... ... ... ... ... ... 45
( -------- opposite, at least the lower ones, ... ... ... ... 50
_ (Fruit ribbed or deeply furrowed, not winged, ... ... ... 46
4 ( -------- four-winged: procumbent, diffuse, leaves sub-sessile, ovate, pilose small,
ASPEKA,
PENTANEBA,
W a ek e e ia n a ,
OLABBA,
U a l z e l l ii,
KAMOSISSIMA,
Stocksh,
SCABBA,
CATJDATA,
COUBTAIXENSIS,
Neilghebbensis,
OVATA,
OBLON GIEOLIA,
W allich iajja,
TRXALATA,
cymosa, Icon. 1979
MICBOPHYLLA,
BOTUNBIPOLIA,
ELLIPTICA,
BICUSPIBATA,
BOSTBATA,
PBOCUMBENS,
DIFFUSA,
AUBICULATA,
R h e e d i i ,
SGABBIBA,
Bobbonica,
MINOB,
18
20
16
15
21
17-28
29
27
10
26
24
25
23
22
31
32
33
34
35
36
37
88
41
44
43