46 Fruit prominently ribbed, 47 
| even or only slightly ribbed, 49 
Lateral ridges thicker (perhaps sometimes enlarging into wings, 48 
47 Í Ridges nearly all equal (10), leaves narrow linear, somewhat strap-shaped, ANGUSTIFOLIA, 39 
Leaves all similar, ovato-lanceolate, pilose on both sides, very branchy, Inpica? 40 
48 Lover leaves ovate lanceolate, upper ones narrow linear lanceolate sub- 
cordate, SUFFRUTICOSA, 
Leaves ovate acute, hairy, much broader at the base, root tuberous, TUBEROSA, 
49 3 broad lanceolate, acute at both ends, petioled, several inflated vesicles 
E at the base of the fruit, VESICARIA, 
Fruit ovate, ribbed or broadly 4-winged, 51 
50 ovate, compressed, ribbed or moderately winged: leaves all opposite, 
long petioled, ZEYLANICA, 45 
Stems decumbent, leayes nearly all opposite, ovate, obtuse, moderately 
51 petioled, 52 
Erect or ascending: leaves mostly alternate, much reduced in size 
towards the apex, 53 
Stems stoutish, leaves short petioled, fruit largely apiculate, PILOSA, 46 
52 slender filiform, petiols longish very slender, upper leaves scarcely 
reduced, JOHNSONIANA, 47 
Stems erect or ascending, ramous, leaves longish petioled, membranous, — TETRAPTERA, ER 
2 long straight, lower branches opposite: leaves alternate, short petiol- 
ed, upper ones sessile small, PYRAMIDATA, 48 
N. B.—The outer row of figures refer to the number of the species in the accompanying plates. 
I.—Leaves simply three-nerved: nerves undivided. 
$ 1. Male flowers 3-androus, fruit not winged. 
1. P. parvifolia (R. W., fig. 1) procumbent, diffuse, 
pubescent: leaves opposite, ovate, or suborbicular : 
flowers few, axillary, short pedicelled ; males trian- 
drous : female ovate slightly ribbed. 
Ceylon, Thwaites. This species is easily distin- 
guished by being 3-androus, which I have found 
constant in five or six flowers examined, it agrees 
however in all other respects with the character of the 
genus, and need not on that account be removed 
Pe = Leaves 4-6 lines long and nearly the same 
readth. 
§ 2. Male flowers 4-androus. 
2. P. integrifolia (Dalzell, Hooker, Kew Gard. Mis- 
cellany, Ic. 1979), leaves opposite, sessile, subcordate, 
broadest at the base, thence tapering uniformly to 
the point, sub-acuminate, united by a broad stipule, 
sparingly pilose on both sides; roughish above: flow- 
ers axillary, subsessile: males tetrandrous or some- 
times 3-androus: fruit 2-3-winged: wings ciliate. 
Mountains, Malabar, flowering September. The 
stipules in this species are more distinct than usual, 
completely connecting the opposite leaves. - 
I am indebted to Mr. Dalzell for the specimen re- 
presented, and from which this character is taken. 
3. P. acuta (R. W. 2), erect, sparingly ramous ; 
leaves sessile, subcordate, lanceolate, acuminate ; sub- 
scabrous above, slightly hoary on the nerves beneath : 
stipules deciduous: flowers axillary, subsessile, 4- 
androus : fruit both winged and ribbed: winged ones 
broad cordate at the base, bicuspidate at the apex; 
ribbed ones simply ovate. 
Courtallum, flowering July and August. 
$ 3. Flowers pentandrous. 
4. P. ovalifolia (R. W. 3), somewhat diffuse, as- 
cending, or =“ 1 8 : leaves subsessile or 
very shortly peti oval ; acutish at the base, sharp- 
ly acuminate; pilose on sides, scabrous above: 
stipules ovate, deciduous: flowers 5-androus, fruit 
ovate or slightly cordate at the base, ciliate at the 
apex.—The leaves in the figure are rather more ovate 
than on the specimen. __ 
Alpine jungles. So far as my specimens show, all 
the leaves of this species are opposite, and nearly oval 
except the short acumen. 
5. P. Mysorensis (R. W. 4), erect, glabrous : leaves 
short petioled, oblong lanceolate, obtuse or subcor- 
date at the base, acuminate at the apex; smooth 
above, glabrous or slightly pilose on both sides, ciliate 
on the margin: flowers pentandrous, fruit ribbed, 
not? winged. 
Narri Bolu, of the Mysorians. 
Bababooden Hills, Mysore, Bertie, flowering De- 
cember. Iam uncertain in regard to the fruit, as it 
is probable that the absence of winged ones may be 
owing to want of maturity of the specimens, but as 
this rests on conjecture only, I am constrained to 
aoto that character, which may in truth be a valu- 
able one. 
6. P. ambigua (R. W. 19), stems erect, round, 
smooth, sparingly branched, pubescent towards the ex- 
tremities : leaves sessile, subcordate, linear lanceolate 
acute, often slightly falcate; glabrous, rough above, 
somewhat velvety beneath, hispid on the margins; 
faintly 5-nerved, the outer pair almost inconspicuous; 
floral ones much reduced in MÀ similar : و‎ ad 
axillary, glomerules compact; fruit ovate, ribbed, 
the lower glomerules, above broadly winged, deeply 
gn دد‎ nr de nsi 
ourtallum, Malabar, flowering during the rains. 
This species so far resembles the figures of P. pen- 
tandra, that previous to examination I considered it 
that species, and even now feel almost disposed to 
look on it as a 4-androus variety of that species, 
hence the specific name, which I have given, refers 
not to any ambiguity of the genus to which the plant 
belongs but the species, that is, I am uncertain 
whether it is a species or variety. 
broadly 
acuminate, acute at the apex, pilose 
on both sides: flowers few, sessile, pentandrous ; fruit 
Ceylon. Gardner, Thwaites. Though in character 
very similar to the preceding, this is a very distinct 
(UP ) 
