80 



APOCYNE^l. XI. PARSONSIA. XII. LYONSIA. XIII. THENARDIA. XIV. ADENUM. XV. APOCYNUM. 



5 P. VELUTINA (R. Br. prod. p. 466.) cymes pedunculate, 

 opposite; leaves cordate, ovate, acute or acuminated, downy, 



Jj . ^"\ S. Native of New Holland, within the tropic. Ecliites 

 velutina, Spreng. syst. 1. p. 634. 

 Velvety Parsonsia. Shrub tw. 



6 P. MOLLIS (R. Br. 1. c.) cymes bifid ; leaves lanceolate, 

 acuminated, soft, downy. Tj . ^. S. Native of New Holland, 

 within the tropic. Ecliites mollis, Spreng. syst. 1. p. 634. 



Soft Parsonsia. Shrub tw. 



7 P. LANCEOLA'TA (R. Br. 1. c.) cymes bifid ; leaves lanceo- 

 late, acuminated, glabrous. fj . *"\ S. Native of New Holland, 

 within the tropic. Ecliites lanceolata, Spreng. syst. 1. p. 634. 



Lanceolate-leaved Parsonsia. Shrub tw. 



3. Asi&ticce. Ovarium 2-celled. Follicles cohering length- 

 raise ? Natives of A sia. 



8 P. OVA'TA (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. ^ . ^. S. Native of Silhet. Cudicia tricho- 

 toma, Hamilt herb. 



Ovate-\ea\ed Parsonsia. Shrub tw. 



9 P. SPIRA'LIS (Wall. cat. no. 1631.) glabrous; peduncles 

 axillary, dichotomous or trichotomous ; flowers corymbose ; 

 leaves coriaceous, ovate, acute. 1? . r \ S. Native of the East 

 Indies. Follicle ovate-lanceolate. 



Spiral Parsonsia. Shrub tw. 



10 P. OBLONGA (Wall. cat. no. 1632.) glabrous; peduncles 

 axillary, triehotomous ; flowers corymbose ; leaves coriaceous, 

 oblong, acuminated. Jj . ^. S. Native of Rangoon and Moal- 

 meyne. 



Oblong-leaved Parsonsia. Shrub tw. 



IIP. JAVA'NICA (Blum, bijdr. p. 1041.) leaves ovate or 

 elliptic-oblong, acuminated, coriaceous, glabrous ; corymbs 

 terminal or axillary, trichotomous ; throat of corolla naked ; 

 branches subsarmentose. Jj . '"\ S. Native of Java, in moun- 

 tain woods. 



Java Parsonsia. Fl. year. Shrub tw. 



12 P. BARBA V TA (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. \j . ^,. S. Native of Java, among bushes, 

 at Kuripan, where it is called Tjunkankan. 



Bearded-flowered Parsonsia. Fl. May, June. Shrub cl. 



f~ A species hardly known. 



13 P. MYRTIFOLIA (Rcem. et Schultes, syst. 4. p. 403.) leaves 

 ovate, acute at both ends, glabrous ; flowers subumbellate, much 

 shorter than the leaves. 1? . ^\ S. Native of Madagascar. 

 Ecliites myrtifolia, Poir. suppl. 5. p. 637. Said by Poiret to 

 be very nearly allied to P. corymbbsa. Flowers terminal. Seg- 

 ments of the corolla oblong, narrow. 



Myrtle-leaved Parsonsia. Shrub tw. 



Cult. For culture and propagation see Echltes, 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. Pentandria, Monogynia. Calyx 5-cleft. Corolla 

 funnel-shaped ; with a 5-parted recurved limb ; segments of the 

 limb equal-sided, valvate in aestivation ; 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 



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. Lyonsia 

 differs principally from Parsonsia in the fruit being a capsule. 



1 L. STRAMINEA (R. Br. prod. p. 4G6.). ^ . ^. G. Native 

 of New South Wales, and Van Diemen's Land. 



Straw-coloured Lyonsia. Shrub tw. 



Cult. For culture and propagation see Echltes, 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. 



LIN. SYST. Pentandria, 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 Soldnum tuberbsum. This genus 

 differs from E xotliostemon in the corolla being rotate. 



1 T. FLORIBU'NDA (H. B. et Kunth, nov. gen. amer. 3. p. 210. 

 t. 240.) leaves ovate-oblong, acuminated, glabrous. ^ . / "\ S. 

 Native near the city of Mexico. Leaves 2-j to 3 inches long. 

 Flowers greenish white. 



Bundle-JIomered Thenardia. Clt. 1823. Shrub tw. 



2 T. UMBELLA'TA (Spreng. syst. 1. p. 636.) leaves ovate, 

 acuminated, tomentose beneath ; cymes terminal. Tj . '"'. S. 

 Native of Cayenne. Apocynum umbellatum, Aubl. guian. 1 . 

 p. 275. t. 108. Flowers purplish, on bibracteate pedicels. 

 Calycine segments oblong, obtuse. 



Umbellale-fiowered Thenardia. Shrub tw. 



Cult. For culture and propagation seeEchiles, p. 76. 



XIV. ADENUM (Aden is the Arabic name of the tree.) 

 Rcem. et Schultes, syst. 4. p. xxxv. and 41 1. Nerium species, 

 Forsk. 



LIN. SYST. Pentandria, 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, 

 S 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. OBE'SUM (Rcem. et Schultes, syst. 4. p. 411.) fj . G. 

 Native of Arabia Felix, on Mount Melhan. Nerium obesum, 

 Forsk. descr. p. 205. Vahl. symb. 2. p. 45. Cameraria 

 obesa, Spreng. l.p. 641. 



Fat Adenium. Shrub. 



Cult. See Pachypbdium, p. 78., for culture and propagation. 



XV. APO'C YN UM (a nameadopted by Dioscorides, from OTTO, 

 apo, from, and KVWV KVVOS, kyon kynos,& dog ; because it was sup- 



