gg F. Pax. — Euphorbiaceae-Cluytieae. 



Sect. 2. Eutrigonostemon Benth. 



Trigonostemon Sect. Eutrigonostemon Benth. in Journ. Linn. Soc. London XVII. 

 (1878) 224; Benth. et Hook. f. Gen. III. (1880) 298; Hook. f. Fl. Brit. India V. (1887) 

 396; Pax in Engler u. Prantl, Pflzfam. III. 5. (1890) 84. — Trigonostemon Sect. Eutri- 

 gonostemon Müll. Arg. in Linnaea XXXIV. (1865) 214 ex parte; in DC. Prodr. XV. 2. 

 (18G6) 1108 ex parte. — Trigonostemon Sect. Silvaea Müll. Arg. in Linnaea XXXIV. 

 1865) 214; in DC. Prodr. XV. 2. (1866) 1110. — Silvaea Hook, et Arn. Bot. Beechey's 

 Voy. (1836) 211. — Athroisma Griff. Notul. IV. (1854) 477. 



Racemi axillares. Stamina 3 ; antherae apice bifidae. 



Nota. Silvaea et Athroisma prioritatem habent ante Eutrigonostcmonem Benth., sed non 

 omnino cum hac sectione quadrant. Cl. Benth am primus characteres sectionis optime de- 

 scripsit; Eutrigonostemon sensu Mülleriano tantum ex parte ad sectionem Benthamianam pertinet. 



2. T. longifolius (Wall.) Baill. Etud. gen. Euphorb, (1858) 341 t. 1 1 f. 12; Müll. 

 Arg. in DC. Prodr. XV. 2. (1866) 11 08; Kurz, Forest Fl. II. (1 877) 406; Hook. f. Fl., Brit. 

 India V. (1887) 396. — ? Athroisma dentatum Griff. Notul. IV. (1854) 478; Icon. 

 pl. asiat. t, 58 5, f. 4 ex Hook. 1. c. — Croton longifolius Wall. Cat. 7717. — Arbor 

 parva vel frutex; ramuli superne densiuscule foliosi, fulvo-pubescentes vel cum foliis 

 junioribus fulvo-subsericei. Petioli 8 — 12 mm longi, validi; limbus 2 — 35 cm longus, 

 5 — 8, rarius 1 1 cm latus, subcoriaceus, argillaceo-pallidus, opacus, integer vel subinteger, 

 mox glabratus, spathulato-lanceolatus, cuspidato-acuminatus, basin versus cuneato-angu- 

 status; costae secundariae utrinque 15 — 20; stipulae 7 mm longae, deciduae, subulato- 

 lanceolatae. Inflorescentia spiciformis 10 — 30 cm longa, multiflora, pedunculata, fulvo- 

 sericea; bracteae subulatae; pedicelli ealycem vix aequantes, fructiferi 6 — 7 mm longi, 

 crassiusculi. Calyx 2 mm longus, lobi lanceolato-ovati, integri, 2 interiores superne 

 membranaceo-subdilatati; petala obovato-oblonga, sicca atro-purpurea, glabra; discus 

 urceolaris; stamina 3; ovarium et Capsula rufo-hispida; styli breviusculi, fere integri, 

 imo apice tantum bilobi. Capsula reflexo-pendula. Semen subglobosum, brunneo- 

 marmoratum, 5 — 6 ] / 2 mm diametiens. — Fig. 2 8. 



Südwestmalayische Provinz, im Norden bis Tenasserim, im Süden bis 

 Sumatra: Malacca, von Tenasserim bis Singapore. — Malacca (Griffith n. 4997!), 

 Tenasserim (Griffith n. 4798!), Perak (ohne Sammlername!), Singapore (Ridley!), 

 Pulo Penang (Wallich n. 7717), Sumatra, Urwald (Hagen!). 



3. T. Forbesii Pax n. spec. — Frutex vel arbor; ramuli superne densiuscule foliosi, 

 glabri vel mox glabrati. Petioli validi, 5 mm longi vel breviores ; limbus 25 — 30 cm 

 longus, 10 — 12 cm latus, membranaceus, opacus, glaber, minute glanduloso-denticulatus, 

 late spathulato-lanceolatus, cuspidato-acuminatus, basin versus cuneato-angustatus; costae 

 secundariae utrinque dn: 30, primario angulo 80° fere insidentes; stipulae non visae. 

 Inflorescentia spiciformis, longissima, zfc 75 cm longa; rhachis angulosa, minute et 

 parce puberula, mox glabrescens; pedicelli fructiferi tenucs, 5 — 10 mm longi. Flores 

 ignoti. Capsulae valvae 1 mm longae, fulvo-pubescentes. Semen globosum, atro- 

 badium, 8 mm diametiens. 



Südwestmalayische Provinz: Sumatra (Forbes n. 1892!). 



Nota. Floribus ignotis species adhuc incomplete nota est, sed verisimiliter T. longifolio 

 proxime affinis. Differt a specie laudata indumento parciore, mox evanido, costis secundariis 

 foliorum crebrioribus et angulo multo majore costae primariae insidentibus, inflorescentiis lon- 

 gissimis pedicellisque tenuioribus. Tnsuper Capsula manifeste major et tomento velutino vestita 

 est nee hispida, et semina atro-badia et majora. 



4. T. villosus Hook. f. Fl. Brit. India V. (1887) 397. — Ramuli cum pagina 

 foliorum inferiore et inflorescentia villoso-ferrugineo-tomentosi. Folia membranacea, 

 oblanceolata, basi angustata, rotundata vel subcordata, acuminata, saepe supra basin 

 contraeta et fere subpanduriformia, demum glabrata, integra vel obscure denticulata, 

 12—18 cm longa, 4 — ö 1 /^ cm lata; costae secundariae utrinque 9 — 14, tenues; petioli 

 \'-> — 3 cm longi. Racemi longe peduneulati; bracteae foliaceae, 1 cm longae; pedicelli 

 bracteas aequantes vel longiores. Flos rj< 4 — 5 mm diametiens; sepala oblonga, villosa; 



