80 APOCYNE. XI. Parsonsta. XII. Lyonsta. 
5 P. veturina (R. Br. prod. p. 466.) cymes pedunculate. 
opposite; leaves cordate, ovate, acute or acuminated, downy, 
h.©. 8. Native of New Holland, within the tropic. Echites 
velutina, Spreng. syst. 1. p. 634. 
Velvety Parsonsia. Shrub tw. 
6 P. méxus (R. Br. 1. c.) cymes bifid; leaves lanceolate, 
acuminated, soft, downy. h.%.S. Native of New Holland, 
within the tropic. Echites móllis, Spreng. syst. 1. p. 634. 
Soft Parsonsia. Shrub tw. 
7 P. vanceoxa‘ra (R. Br. l. c.) cymes bifid ; leaves lanceo- 
late, acuminated, glabrous. h.^©. S. Native of New Holland, 
within the tropic.  Ecbites lanceolata, Spreng. syst. 1. p. 634. 
Lanceolate-leaved Parsonsia. Shrub tw. 
$3. Asidtice. | Ovarium 2-celled. Follicles cohering length- 
nise? Natives of Asia. 
8 P. ova'rA (Wall. cat. no, 1630.) panicle terminal, diffuse ; 
composed of trichotomous peduncles ; flowers corymbose ; leaves 
on long petioles, ovate-acuminated, somewhat cordate at the 
base, glabrous. 5. ^. S. Native of Silhet. Cudicia trichó- 
toma, Hamilt. herb. 
Ovate-leaved Parsonsia. Shrub tw. 
9 P. sptra‘tis (Wall. cat. no. 1631.) glabrous; peduncles 
axillary, dichotomous or trichotomous; flowers corymbose ; 
leaves coriaceous, ovate, acute. b. ^^. S. Native of the East 
Indies. Follicle ovate-lanceolate. 
Spiral Parsonsia. Shrub tw. 
10 P. osrówca (Wall. cat. no. 1632.) glabrous; peduncles 
axillary, trichotomous ; flowers corymbose ; leaves coriaceous, 
oblong, acuminated. h.^.S. Native of Rangoon and Moal- 
meyne. 
Oblong-leaved Parsonsia. Shrub tw. 
11 P. Java’ntca (Blum. bijdr. p. 1041.) leaves ovate or 
elliptic-oblong, acuminated, coriaceous, glabrous; corymbs 
terminal or axillary, trichotomous; throat of corolla naked; 
branches subsarmentose. h.™. S. Native of Java, in moun- 
tain woods. 
Java Parsonsia. Fl. year. Shrub tw. 
12 P. Barpa‘ra (Blum. bijdr. 1042.) leaves on short petioles, 
opposite, or 3 in a whorl, oblong, acuminated or bluntish, gla- 
brous, tomentose in the axils of the veins beneath; corymbs 
axillary or terminal, trichotomous; throat of corolla bearded ; 
branches climbing. h.. S. Native of Java, among bushes, 
at Kuripan, where it is called Tjunkankan. 
Bearded-flowered Parsonsia. Fl. May, June. 
+ A species hardly known, 
13 P. myrriroria (Roem. et Schultes, syst. 4. p. 403.) leaves 
ovate, acute at both ends, glabrous; flowers subumbellate, much 
shorter than the leaves. b. ^. S. Native of Madagascar. 
Echites myrtifólia, Poir. suppl. 5. p. 637. Said by Poiret to 
be very nearly allied to P. corymbósa. Flowers terminal. Seg- 
ments of the corolla oblong, narrow. 
Myrtle-leaved Parsonsia. Shrub tw. 
Cult. For culture and propagation see Echites, p. 76. 
XII. LYO'NSIA (in memory of Israel Lyons, author of 
Fasciculus Plantarum circa Cantabrigiam nascentium; and from 
whom Sir Joseph Banks received his earliest instructions in 
botany). R. Br. in mem. wern. soc. 1. p. 66. prod. p. 466. 
Lin. syst. Pentándria, Monog?jnia. Calyx 5-cleft. Corolla 
funnel-shaped ; with a 5-parted recurved limb; segments of the 
limb equal-sided, valvate in zstivation; throat and tube with- 
out scales. Stamens exserted : filaments inserted in the middle 
of the tube, filiform; anthers sagittate, cohering by their middle 
to the stigma; with the hind lobes destitute of pollen. Ova- 
. rium 2-celled. Style 1, filiform, dilated at the apex ; stigma 
Shrub cl. 
XIII. TuHENARDIA. 
XIV. Apenum. XV. Apocynum. 
somewhat conical. Hypogynous scales connate. Capsule cylin- 
drical, 2-celled, with follicle-formed valves, and a free, parallel 
dissepiment, which is seminiferous on both sides, and adnate 
placentas.—Shrub twining. Leaves opposite. Cymes terminal, 
trichotomous. Flowers small, with bearded limbs. Lyénsia 
differs principally from Parsénsia in the fruit being a capsule. 
1 L. srraminea (R. Br. prod. p. 466.). 5.^. G. Native 
of New South Wales, and Van Diemen’s Land. 
Straw-coloured Lyonsia. Shrub tw. 
Cult. For culture and propagation see Echites, p. 76. 
XIII. THENA’RDIA (named by Kunth after his friend 
L. J. Thenard, who has written on the chemical physiology of 
plants). H. B. et Kunth, nov. gen. amer. 3. p. 209. 
Lis. syst.  Pentándria, Monogynia. Calyx small, 5-parted. 
Corolla rotate, with a very short tube, and a 5-parted limb; 
segments of the limb equal-sided ; throat naked. Stamens ex- 
serted, inserted in the base of the corolla; anthers sagittate, 
adhering by their middle to the stigma.  Ovaria 2, girded by 
5 hypogynous scales. Style filiform; stigma pentagonal, ter- 
minated by a clavate tubercle.—Shrubs twining. Leaves oppo- 
site. Peduncles interpetiolar, somewhat trichotomously branched. 
Flowers umbellately crowded on long pedicels, bracteate, with 
the appearance of those of Solanum tuberdsum. This genus 
differs from E xothostémon in the corolla being rotate. 
1 T. rzonisv xa (H. B. et Kunth, nov. gen. amer, 2. p. 210. 
t. 240.) leaves ovate-oblong, acuminated, glabrous. kh. ^. S. 
Native near the city of Mexico. Leaves 23 to 3 inches long. 
Flowers greenish white. 
Bundle-flowered 'Thenardia. Clt. 1823. Shrub tw. 
2 T. vwsrLLA'TA (Spreng. syst. l. p. 636.) leaves ovate, 
acuminated, tomentose beneath; cymes terminal. hk. ^. S. 
Native of Cayenne. Apócynum umbellàtum, Aubl. guian. 1. 
p. 275. t. 108. Flowers purplish, on bibracteate pedicels, 
Calycine segments oblong, obtuse. 
Umbellate-flowered Thenardia. Shrub tw. 
Cult. For culture and propagation see Echites, p. 76. 
XIV. ADE NUM (Aden is the Arabic name of the tree.) 
Roem, et Schultes, syst. 4. p. xxxv. and 411.— Nérium species, 
Forsk. 
Lin. syst. Pentándria, Monogynia. Calyx 5-parted. Corolla 
salver-shaped, downy, furnished with 5 villous lines inside ; 
segments of the limb roundish. Filaments short, inserted in 
the upper end of the narrower part of the tube; anthers sagittate, 
cohering with the stigma, ending in a pilose bristle at the apex, 
length of corolla. Ovaria 2, globose. Style length of anthers; 
stigma capitate, bidentate at apex, side quinquidentate. Hy- 
pogynous scales none. Throat of corolla naked.—A shrub, 
with a soft caudex, referrible to a bulb, of the size of a man’s 
head. Branches thickness of a finger, same substance as the 
caudex, attenuated at top; floriferous branches woody, and full 
of cicatrices. Leaves approximate at the tops of the branches, 
3 inches long, oblong, narrowed at the base, mucronate, veinless, 
villously tomentose beneath, when young soft on both surfaces, 
with some rigid bristles in the axils. Corymbs terminal, many- 
flowered ; pedicels short, villous. Anthers yellow, with a brown 
mark inside. 
1 A. opz'sum (Roem. et Schultes, syst. 4. p. 411.) h.G. 
Native of Arabia Felix, on Mount Melhan. Nérium obésum, 
Forsk. descr. p. 205. Vahl. symb. 2. p. 45. Cameraria 
obésa, Spreng. 1. p. 641. 
Fat Adenium. Shrub. 
Cult. See Pachypódium, p. 78., for culture and propagation. 
XV. APO'CYNUM (a nameadopted by Dioscorides, from aro, 
apo, from, and kvev kvvoc, kyon kynos,a dog ; because it was sup- 
