APOCYNE^E. XVIII. H^MADICTYON. XIX. CERCOCOMA. XX. PRESTOKU. 



83 



amer. 3. p. 220. Leaves 4-4i inches long ; with the glands at 

 the base hardly visible. Spikes almost sessile, half a foot long. 

 Flowers sessile. Corolla glabrous, with a green tube and a 

 yellow limb, with reflexed segments. This species differs par- 

 ticularly from the rest in the flowers being disposed in terminal 

 spikes, instead of interpetiolar racemes. 



Javita Exothostemon. Fl. June. Shrub tw. 



7 E. PALUDOSUM; leaves oblong or oblong-linear, acute at both 

 ends, glabrous; flowers 2-4 together, terminal, pedunculate; 

 calycine segments oblong, acute. Tj . ^. S. Native of Cuba, 

 and other parts of America, on the sea shore. Echites paludosa, 

 Vahl. eclog. 2. p. 19. t. 5. H. B. et Kunth, nov. gen. amer. 3. 

 p. 221. Leaves 2 or 2^ inches long, without any glands at the 

 base. Corollas white, glabrous outside. 



Marsh Exothostemon. Fl. March. Shrub tw. 



Cult. For culture and propagation see Echites, p. 76. 



XVIII. H.EMADl'CTYON<from a>a, haima, blood, and 

 f Ik-rue^, dictyon, a net ; in reference to the veins and nerves of 

 the leaves being red). Lindl. in hort. trans. 6. p. 71. Echites 

 species, Sims and Tussac. 



LIN. SYST. Pentandria, Monogynia. Corolla salver-shaped ; 

 segments reflexed, equal, dilated ; throat of the tube furnished 

 with 5 inclosed scales. Stamens inclosed ; anthers sagittate, 

 cohering by their middle to the stigma. Ovaria twin. Style 

 filiform ; stigma capitate. Hypogynous glands 5, alternating 

 with the calycine segments. Twining shrubs, with opposite 

 leaves, and axillary racemes of flowers. 



1 H. VENOSUM (Lindl. 1. c.) leaves lanceolate, glabrous, a little 

 blistered, and beautifully traversed by crimson veins ; racemes 

 drooping. \ . r ^. S. Native of St. Vincent. Echites niitans, 

 Sims, bot. mag. 2473. Echites sanguinolenta, Tussac. fl. ant. 

 Flowers of a yellow green colour, pale in the center. 



F'n/-leaved Haemadictyon. Fl. June, Aug. Clt. 1821. 

 Shrub tw. 



2 H. SUBERE'CTA ; leaves rather ovate, downy beneath, mu- 

 cronate ; racemes many-flowered. Jj . f *. S. Native of Ja- 

 maica and St. Domingo. Echites suberecta, Swartz, obs. 101. 

 Jacq. amer. 32. t. 26. icon. pict. t. 33. Andr. bot. rep. 187. 

 Sims, bot. mag. 1064. Apocynum speciosissimum, Mill. diet. 

 Nerium sarmentosum, Browne, jam. 180. Sloan, jam. p. 89. 

 hist. 1. p. 206. t. 130. f. 2. Corollas large, with a cylindrical 

 tube : hairy outside, yellow. Hypogynous scales concave, obtuse. 

 Stems scandent, hardly twining. Calycine segments lanceolate. 



Erectish Haemadictyon. Fl. Ju. Aug. Clt. 1759. Sh. cl. 



3 H. CIRCINA'LIS ; leaves elliptic, glabrous ; racemes many- 

 flowered : having the peduncles articulated; teeth of calyx 

 acute. \i . ^. S. Native of the Antilles, and St. Domingo. 

 Echites circinalis, Jacq. Swartz. prod. 52. fl. ind. occ. 1. 

 p. 529. Flowers small, white, with undulated segments and 

 villous throat. Calyx and corolla velvety outside. 



Circinal Haemadictyon. Shrub tw. 



Cult. For culture and propagation see Echites, p. 76. 



XIX. CERCOCO'MA (from ceproc, kerkos, a tail, and KOfin, 

 kome, a head of hair ; in reference to the stipitate tuft of hairs 

 at the top of the seed). Wall. cat. no. 1623. 



LIN. SYST. Pentandria, Monogynia. Calyx short, 5-toothed. 

 Corolla salver-shaped ; with a terete tube and a 5-lobed spread- 

 ing limb. Stamens inclosed. Follicles 2, divaricate, horizontal, 

 large, 9 inches long, acuminated, 2-valved, many-seeded. Seeds 

 lanceolate, tapering to the top, where it ends in a long, stipitate 

 tuft of white hairs. Branches warted. Leaves opposite, gla- 

 brous, oblong, acuminated. Panicles corymbose, furnished with 

 many opposite, ovate, acute small bracteas. 



1 C. SINGAPORIA NA (Wall, cat. no. 1623.). fj. S. Native of 

 the East Indies. 



Singapore Cercocoma. Shrub. 



Cult. For culture and propagation see Echites, p. 76. 



XX. PRESTO'NIA (named after Charles Preston, M. D., 

 a correspondent of Ray ; and styled by him " Eruditissimus vir, 

 et Curiosissimus stirpium Observator." Many of his observa- 

 tions, chiefly on the more minute plants, occur in Ray's " Me- 

 thodus emendata." Blair also mentions him as an ingenious and 

 expert botanist). R. Br. in mem. wern. soc. 1. p. 69. H. B. 

 et Kunth, nov. gen. amer. 3. p. 221. 



LIN. SYST. Pentandria, Monogynia. Calyx 5-parted. Co- 

 rolla salver-shaped ; throat crowned with an undivided annular 

 tube, and 5 scales, which alternate with the segments of the 

 limb. Anthers semi-exserted, sagittate, cohering by their middle 

 to the stigma ; with the hind lobes destitute of pollen. Ova- 

 ria 2. Style 1, filiform, dilated at top; stigma turbinate : with 

 a narrower point. Hypogynous scales 5, distinct or joined. 

 Follicles like those of Echites. Twining shrubs. Leaves oppo- 

 site. Corymbs or racemes crowded, interpetiolar. Calyx foli- 

 aceous : having the segments furnished each with a scale inside 

 at the base. 



1 P. TOMENTOSA (R. Br. 1. c. p. 70.) tomentose ; corymbs 

 crowded ; hypogynous scales combined into an urceolus. T? . '\ 

 S. Native of Brazil, near Rio Janeiro, where it was collected 

 by Sir Joseph Banks. Flowers large, yellow. 



Tomentose Prestonia. Shrub tw. 



2 P. MOLLIS (H. B. et Kunth, nov. gen. amer. 3. p. 221. 

 t. 242.) leaves ovate-oblong, acute, subcordate, hairy above, 

 but clothed with soft canescent down beneath ; flowers race- 

 mose ; hypogynous scales free. Ij . '\ S. Native on the banks 

 of the river Amazon, near Tornependa, in the province of Jaen 

 de Bracamoros. Flowers large, yellow : hairy, ventricose 

 at the base, and downy. 



Soft Prestonia. Fl. Aug. Shrub tw. 



3 P. GLABRA'TA (H. B. et Kunth, nov. gen. amer. 3. p. 222.) 

 leaves ovate-oblong, short-acuminated, cordate, glabrous ; flowers 

 racemose ; hypogynous scales free. fj . ''X S. Native of Quito, 

 near Guayaquil, on the shore of the Pacific Ocean. Corollas 

 yellow, size of those of Vinca rbsea. Pedicels hairy. 



Glabrous Prestonia. Fl. Feb. Shrub tw. 



4 P. HIRSC'TA ; leaves oblong-oval, acuminated, villous be- 

 neath ; flowers racemose ; hypogynous scales free. tj . *"*. S. 

 Native of Peru, in forests. Echites hirsuta, Ruiz et Pav. fl. 

 per. 2. p. 19. t. 136. Glands one or two at the base of each 

 leaf. Calycine segments acute in the flowering state, but blunt 

 in the fruiting state. Corollas yellow. 



Hairy Prestonia. Shrub tw. 



5 P. PERUVIA'NA (Spreng. syst. 1. p. 637.) leaves roundish, 

 cordate, acuminated, tomentose, glanduliferous ; peduncles race- 

 mose, tj . '"*. S. Native of Peru, in woods. Echites glan- 

 dulosa, Ruiz et Pav. fl. per. 2. p. 19. t. 135. Stems bearing 

 glands at the joints, in the recesses at the base of the leaves, 

 and along the petioles and stipulas. Leaves large, white be- 

 neath, with red or purplish veins. Pedicels reflexed. Corollas 

 large, yellow. Perhaps a species of Hcemadictyon, 



Peruvian Prestonia. Shrub tw. 



6 P. O.DINQUANGULA V RIS (Spreng. syst. 1. p. 637.) leaves 

 obovate or oblong-ovate, acuminated ; peduncles racemose, 

 generally 8-flowered ; calycine segments with reflexed tops. 

 Tj . ^. S. Native of South America, and the West Indies. 

 Echites quinquangularis, Jacq. amer. 32. t. 25. ed. pict. t. 32. 

 Stems scabrous. Leaves 3 inches long. Corolla large, green, 

 with a yellowish limb : and having the throat of the tube pen- 



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