APOCYNACEAE. — TRACHELOSPERMUM 337 



CoroUae tubus circiter 1.4 cm. longus. Folia ad 13.5 cm. longa et 4.5 cm. 



lata (fide Craib) 2. T. siamense. 



Sepala 2-2.5 mm. longa, plus minusve adpressa; corollae tubus 8-10 mm. 

 longus (si tubus tantum 6-7 mm. longus, confer 1. T. divaricatum, var. 



brevisepalum) 3. T. gracilipes. 



Alabastra acuta v. subobtusa, lobis parte dilatata tubi vix v. paulo longioribus, 

 interdum subbrevioribus v. faux distincte pilosa; antherae fere semper 

 inclusae. 

 Sepala brevia, parte inferiore baud dilatata tubi duplo v. ultra breviora, 

 plus minusve adpressa, vix 2.5 (-3) mm. longa (confer etiam 1. T. di- 

 varicatum, var. brevisepalum). 

 Folliculi visi ad 13 cm. longi et 0.5 cm. lati; comae seminales seminibus 



aequilongae 4. T. cathayanum. 



Folliculi ad 35 cm. longi et 4 mm. lati; comae seminales seminibus duplo 



longiores 6. T. lucidum. 



Sepala longiora, parte inferiore tubi tantum }4 breviora v. aequilonga v. 



3.5-5 mm. longa, apice distincte patula v. reflexa. 



Corollae tubus circiter 9-10 mm. longus; sepala fere semper apice reflexa. 



Folliculi ad 21 cm. longi, angulo 180° divergentes. 5. T. jasminoides. 



Corollae tubus c. 13-14 mm. longus; sepala apice paulo v. vix patula. 



Folliculi ad 40 cm. longi, paralleli 7. T. tetanocarpum,. 



Tubus corollae brevis, tantum basi paulo dilatatus; stamina in parte inferiore 

 inserta; styli breves. Valvae fructuum satis crassae. 



Subgen. 2. AXILLANTHUS. 

 8. T. axillare. 

 Ovarium fructusque pilosus. 



Squamae calycis ut in subgen. 1 et 2, florum structura ut in subgen. Axillanthus, 

 sed sepala medio tubi paulo longiora. Subgen. 3. PSEUDAXILLANTHUS. 



9. T. Dunnii. 



Squamae calycis minores, ut videtur decem v. plures (v. tantum 5, ex King & 



Gamble); tubus corollae apice attenuatus, infra medium ad insertionem sta- 



minum dilatatus sed basi constrictus. Folliculi maturi angulo recto divergentes. 



Subgen. 4. LACHNOCARPUS. 



FolUculi ad 23 cm. longi et 7 mm. lati 10. T. Curtisii. 



Folliculi ad 14 cm. longi et 12 mm. lati 11. T. auritum. 



ENUMERATIO SPECIERUM. 



Subgen. 1. EUTRACHELOSPERMUM K. Schumann in Engler & Prantl, 

 Natilrl. Pflanzenfam. IV. Abt. 2, 173 (pro sectione) (1895). 



The principal differences of the four subgenera are briefly stated in the key. 

 They are found in the structure of the flowers and of the fruits, while in the inflo- 

 rescences there are only slight differences. The seeds of Eutrachdospermum are 

 more or less angular-cylindric with a furrow, while they are broader and flatter in 

 the two other subgenera. The angle in which the folhcles diverge seems to be 

 rather variable in the first subgenus, and the fruits and seeds of species No. 1-7 need 

 further investigation. 



1. Trachelospermum divaricatum Kanitz in Termisz. Fuzet. II. 46 (Anthoph. 

 Jap.) (1878). — K. Schumann in Engler & Prantl, Nat. Pflanzenfam. IV. Abt. 2, 

 173 (1895), exclud. icone et sjti. Lemaire. — Schneider, III. Handh. Laubholzk. 

 II. 851 (pro parte) (1912). — Matsumura, Ind. PI. Jap. II. pt. 2, 507 (1912). 



