HERNANDIACEAE 

 Illigera Pelelotii sp. nov. § Appendiculatae l "ifnj^^. Q. CLÛ . ^ i i /^S^, /^t^9 



Frutex scandens, plus minusve piibescens, cauiibus in sicco subcastaneis, 

 longitudinaliter sulcatis, leviter pubescentibus glabrescentibus, ramulis ulti- 

 mis teretibus, 1.5-2 mm. diametro, parce pubescentibus; foliis 3-foliolatis, 

 petiolo 7-9 cm. longo, leviter pubescenti, axillis plerumque alabastra ferru- 

 gineo-pubescentia gerentibus; foliolis subcoriaceis vel junioribus submem- 

 branaceis. ellipticis anguste ovato-ellipticis vel leviter obovato-ellipticis, 

 breviter obtuse acuminatis. basi leviter cordatis. 8-12 cm. longis, 5-7 cm. 

 latis, supra glabris vel ad costam nervosque breviter pubescentibus, in sicco 

 olivaceo-brunneis, subnitidis, subtus paullo pallidioribus, breviter molli- 

 terque subconsperse pubescentibus, nervis lateralibus utrinque 4, curvato- 

 adscendentibus, arcuato-anastomosantibus, subtus distinctis, elevatis, reticu- 

 lis priniariis gracilibus, distinctis; petiolulis breviter pubescentibus, 1.2-1.5 

 cm. longis; inflorescentiis terminalibus, Iaxis, amplis, ad 25 cm. longis, ramis 

 paucis, 10-15 cm. longis, breviter pubescentibus; floribus (ut videtur 

 paucis) ignotis, bracteis oblongo-ellipticis, utrinque pubescentibus, 2-3 mm. 

 longis; fructibus maturis (cum alis) 4-S cm. latis, 2.5 cm. longis, apice 

 distincte retusis, leviter pubescentibus, late bialatis et inter alas latiores 

 anguste bicarinatis, alis latissime rotundatis, glabris vel subglabris. 



Ixdo-Chixa, Bac Giang Province, between Kep and Pho Vi, Pételot 2476, February 

 27, 1936, borders of the forest. 



Although the flowers of this species are as yet unknown, it is suspected 

 that it belongs in Dunn's section Appendiculatae because of its gênerai 

 resemblance to Illigera Picrrci Gagnep. It differs from Gagnepain's species, 

 of which an isotype is available, in its leaves being softly pubescent be- 

 neath, those of /. Picrrei Gagnep. being glabrous except for the indumentum 

 in the axils and along the midrib below on the lower surface, the différences 

 in the fruits being even more striking. In Pierre 1950, 1956 from Baochiang 

 and Mokay, Bienhoa Province, the fruit w^ings are 3 to 4 cm. long and 

 2 to 3.5 cm. wide, and elliptic in outline; in Pételot 2476 they are sub- 

 orbicular and 2.5 cm. long and wide. 



Illigera niollissima W. VV. Sra. Notes Bot. Gard. Edinb. 10: 42. 1917. 



Illigera cordala Dunn, Jour. Linn. Soc. Bot. 38: 296, IPOS, pro minore parte, quoad 



Hancock 538 et "foliolis suborbicularibus — ubique molliter pubescentibus." 

 Dunn's species was based on two différent entities, Hancock 538 clearly 

 166 >2***-. JOURNAL OF THE ARNOLD ARBORETL'M [vol. xxiii /fyj, 



being the same as Illigera mollissima VV. W. Sm.; the three Henry numbers 

 cited by him are retained as representing /. cordata Dunn as apparently 

 Dr. Smith interpreted Dunn's species from the Henry material when he de- 

 scribed Illigera mollissima W. W. Sm. .\ny other interprétation would in- 

 volve the acceptance of Illigera cordata Dunn as appertaining to the species 

 with softly pubescent suborbicular leaves, the réduction of /. mollissima 

 W. W. Sm. to synonymy, and the description of Henry 9902, 9902 A, 10649 

 (spécimens of ail of which are before me) as a new species. Illigera 

 mollissima W. W. Sm., as thus interpreted, is represented in the herbarium 

 of the .Arnold Arboretum by the following spécimens: Szechuan, Forrcst 

 21403 ; Yunnan, Dclavay 3600 and two sheets s.n. (distributed as/, cordata 

 Dunn), /?. C. Ching 20217, April 25, 1939. 



