Thus—“a, stems twining—y, capsules and sepals moderate sized or small—m, flowers not capitate
pj leaves cordate—q, leaves entire—r, flowers two or three—w, one- to three-flowered v
leaves cordate acuminated, stems glabrous or softly villous. I. obscuraf
. appears not improbable that there are some additional genera, as well as species not
included in this Clavis, natives of the the Peninsula, I send along with it M. Choisy’s own
Conspectus Generum, published in the Annates des Sciences Naturelles, for September 1834,
and leave you to determine on the propriety of reprinting it among your selections.
1 remain, &c.
R o b e r t W ig h t .
EXPLANATION OP PLATES.
Pharbitis A. C. D., ovar. 3-celled.
Ipomea A. C. D. F. G. H., sepals verticillate.
Batatas A. C.D.E., cor. campanulate, stamens included.
Quamoclit A. C. D. E., coroL infundibuhform, stamens
exserted.
Rivea A. B., ovar. 4-celled.
Aniseia A. C. D. P. G. H., sepals inserted, some lower
down than others.
Ipomea obscura.—a. g. m. p. q. r. u. v.—I. obscura.
CONVOLVULACEÆ.
Clavis o f the Genera.
Embryo, without cotyledons -
-------- - with cotyledons. A.
» < Fruit, a dry berry. B.
$ --------- capsular. C.
r> 5 Ovarium, 4-celled, - - - .
} -------------3 - c e l l e d , ...........................................................
q ^ Styles single, undivided. D.
I --------- single and bifid, or 2 styles. K. {Ovarium, 4-celled. E.
-------------3-celled, .
--------------3-celled. F.
-------------- 1-celled. I.
j, $ Corolla infundibuliform: stamens exserted, -
I --------- campanulata: stamens included,
p < Stamens exserted, corolla infundibuliform,
l --------------included. G.
q < Lobes of stigma, globose. H.
\ --------------------- - filiform or terete, -
tt < Sepals, verticillate, -
I ----------inserted, some lower down than others,
j < Lobes of stigma, flattened, ovate, -
( ---------------------- globose, sepals enlarged after flowering,
g | Styles 1. bifid: anthers included, -
t S Styles, undivided: stigmas globose, anthers exserted,
I --------- each bifid, - - . _
- 15 Cuscuta.
1 R ivea.
2 A rgyreia.
5 P harbitis.
3 Q uamoclit.
4 Batatas.
6 Calonyction.
8 Convolvulus.
7 I pomæa.
9 Aniseia.
*10 H ewittia (W. & A.).
- 11 PORANA.
12 Breweria.
- 13 Cressa.
14 Evolvulus.
Clavis o f the Species.
1. R ivea. Ch.
Corolla inflated, cylindiicaL .........................................................................1 R. tiliaafolia, ch.
----------witn umb spreading, a.
C Corolla hypocraterif., tube equal, narrow, peduncles 1-flowered. - - S R . hypocraterif, Letts.
a \ - intundibulii., tube wider upwards, peduncles 3-flowered or with 2
< Iateral abortive ones.....................................................................................................3 R. bona-nox.
10 Shutbria Ch. (not W. & A.)
2 . A rgyreia. Lour . Lettson. Roxb.
Stamens included, a.
--------protruded beyond the tube. p.
( Leaves tomentose, silky, or velvety on the under side. b.
£-----— villous, or pubescent, glabrous or hairy on the under side. h.
( Leaves cordate at the base. c.
£--------elliptical, oblong, or lanceolate, e.
CLeaves softly tomentose and silky underneath; flowers somewhat um-
? belled, d.
{------- harshly tomentose, underneath; flowers cymose, stems hairy,
5 Stamens tomentose: bracteas oval, acuminated, waved, -
[ --------pubescent or glabrous; bracts lanceolate or linear, -
$ Leaves glabrous on upper side. f .
I --------- clothed on upper side. g.
t Leaves roundish oblong, acute, •
( --------lanceolate acuminated,. - - . -
( Leaves subacute, upper side strigosely hirsute, under sericeous tomentose,
4 --------obtuse, both sides velvety, -
( Leaves cordate at the base. i.
$ ----- not cordate, o.
( Stem harshly hairy, k.
^----- glabrous, or pubescent or villous, m.
$ Flowers capitate, capitulum surrounded by bracteas, -
l --------umbelliform, bracteas all mingled with flowers. 1.
( Hairs reddish; sepals ovate, elliptical obtuse, -
£ Leaves underneath livid or glaucous, sepals linear lanceolate pointed,
C Exterior sepals equal to, or smaller than the others: leaves with a short broad
< sinus, - - - - - - - -
d --------------------- the largest and with margins revolute, n.
$ Stem and leaves villous or softly pubescent, ' -
£-------------------sprinkled with short adpressed pubescence, or glabrous,
( Leaves obovate-cuneate, emarginate; peduncle 3-6-flowered,
1 ’« elliptical, ovate or obovate; panicle lax, corymbose,
< Flowers capitate, leaves tomentose underneath, -
^ --------corymbose or cymose. q.
C Stem and underside of leaves hirsute or strigose with adpressed hairs; pedun-
< cles a little longer than the petiole, - - - - - 20 A. setosa.
( ----- and leaves more or less pubescent; peduncles the length of the leaves, 21 A. cymosa.
205
4 A. hirsuta(W & A.),
5 A. speciosa.
6 A. argentea.
7 A. bracteata, Ch.
8 A. fulgens, Ch.
9 A. Leschenaultii, Ch.
10 A. pomacea, Ch.
11 A. capitata.
12 A. Neilgherryana.
13 A. pilosa (W. & A.)
14 A. populifolia, Ch.
15 A. Roxburghii.
16 A. Malabarica.
17 A. cuneata.
18 A. elliptica.
19 A. aggregata. .
3. Q uamoclit. Ch.
Leaves entire, or angled, or 3-lobed,
------ pinnately cut,
22 Q. phcenicea.
23 Q. vulgaris.
4. Batatas. Rumph. and Choisy.
Leaves entire, angled or cleft, a.
------ quinate: stem twining, hirsute, - - - - - 24 B. pentaphylla.
f Sepals ovate lanceolate, a little unequal: stems usually prostrate; peduncles
< few-flowered, - - - - - - - 25 B. edulis. .
{ ------ roundish ovate, equal: stem twining glabrous: peduncles many-flowered, 26 B. paniculata.
5. P harbitis. Ch.
Leaves entire; pedicels longer than the bracts, nearly as long as the sepals, 27 P. hispida.
- 3-lob ed or entire, pedicels usually shorter than uie bracts, about £ of the
length of the sepals,
6. Calonyction. Ch.
equal, with an awl-like point; flowers, large, white,
flowers smaller, purplish,
- unequal, obtuse, or with a very short point,
- 29 C. speciosum.
30 C. speciosum.
- 31 C. asperum.
l 1
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i f
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