o58 WILSON EXPEDITION TO CHINA 



Flores aperti 2.5-3 cm. lati, tubo ad 12-15 mm. longo; sepala (fide Kurz) 



tria in fructu amplificata, ad 4 cm. longa 5. P. spectabilis. 



Ovaria ovulis 2 instruct a. 



Stigmata staminaque fere ut in Euporana, discus distinctus. 



Subgen. 2. PSEUDODINETUS. 



6. P. dinetoides. 



Stigmata plus minusve claviformia, paulo longiora quam lata, apice emarginata; 



stamina 1-v. 3-seriatim in tubo inserta filamentis liberis quam antherae 



distincte brevioribus; discus nuUus (an semper?) . Subgen. 3. DINETUS. 



Sepala in fructu omnia amplificata, aequalia; flores parvi, 8-12 mm. longi. 



Sepala in fructu ad 2.5 cm. longa et 9-11 mm. lata, elliptico-oblonga. 



7. P. malabarica. 

 Sepala in fructu ad 12-15 mm. longa, versus apicem 3-4 mm. lata, oblongo- 



spathulata 8. P. racemosa. 



Sepala in fructu inaequaUa 3 valde 2 minus aucta; flores majores, 2.5-3.5 cm. 

 longi. 

 Sepala in flore subaequalia; stamina parte basali leviter dilata 1 seriatim 

 inserta; tubus intus infra stamina circa gynaeceum pilosus. 

 Sepala fructifera majora circiter 1 cm. lata; bracteae inflorescentiae 



parvae, lanceolato-fiUformes 9. P. grandiflora. 



Sepala fructifera majora (fide Kurz) vix 4 mm. lata; bracteae inflores- 

 centiae foUaceae v. lanceolatae, caudatae ... 10. P. stenoloba. 

 Sepala in flore distincte inaequalia; stamina in tubo baud dilatato 3- 

 seriatim inserta; tubus tantum ima basi intus circa ovarium pilosulus. 



11. P. triserialis. 



ENUMERATIO SPECIERUM GENERIS PORANAE.i 



Subgen. 1. EUPORANA Peter in Engler-Prantl, Nat. Pflanzenfam. IV. Abt. 

 3», 24 (emend.) (1891). 



The type of Parana is P. volubilis Burman, the ovary of which contains 4 ovula 

 and bears a two-cleft style. I think it best to refer to Euporana all the species with 

 ovaries containing 4 ovula. All those species have globular stigmas. 



1. Porana volubUis Burman, Fl. Ind. 51, t. 21, fig. 1 (1768). — Roxburgh, Fl 

 Ind. II. 40 (1824); ed. 2, 465 (1832). — Wight, Icon. PI. Ind. Orient. II. t. 347 

 (1843); III. Ind. Bot. II. t. 168^ fig. 8 (1850). — Choisy in De Candolle, Prodr. 

 IX. 436 (1845). — Kurz in Jour. Bot. XI. 137 (1873). — Clarke in Hooker f., Fl. 

 Brit. Ind. IV. 222 (1883). — Koorders, Excursionsfl. Java, III. 114 (1912). 



INDIA. Malaya: (No. 58741, Herb. Griffith); without locality (No. 2000, 

 Herb. Wight). 



2. Porana discifera Schneider, n. sp. 



Frutex alte scandens; ramuU biennes purpureo-brunnei, contorto-striati, len- 

 ticellosi, sparse pubescentes, floriferi dense flavo-tomentelU. FoUa late cordato- 

 rotundata, basi profunde et subanguste cordata, apice satis subito late acutata, 



^ Bentham, F. v. Mueller and Peter refer to Porana as a distinct subgenus also 

 Duperreya sericea Gaudichaud, Voy. Freyc. Bot. 1.452, t.63 (1826) (Ipomoea modesta 

 F. v. Mueller, Fragm. Phys. Austral. II. 22 [I860]. — Porana sericea F. v. Mueller, 

 1. c. VI. 100 [1867]) from Australia. But this plant is so distinct regarding the single 

 axillary flowers, the linear leaves with very short petioles, the shape of the flowers 

 and the silky pubescence that I think it best not to unite Duperreya with Porana. 



