BLUMEA23 (1976) 121—138 Conspectus of the generaRadermacheraandFernandoa in Indo-Malesia (Bignoniaceae) C.G.G.J. van Steenis Rijksherbarium, Leiden, Netherlands Summary is In Radermachera 16 named species (among which three new) are keyed out. The genus Mayodendron reduced to Radermachera; one new combination is made. One Phillippine species known only from a lost doubtful. About into of which for the presumably type remains 34 names are put synonymy, many time. first Species are listed and provided with references and critical notes; for most species the sheets examined cited. cited and all have been examined. excluded from the are Types are except one Six namesare and referred to other In the the I have also included the of genus are names. key to species species genera viz. other similar to Radermachera, Pauldopia and Barnettia, for the convenience of workers. The African genus Fernandoa is extended to occur in Indo-Malesia by the reduction of Haplophragma, A is Spathodeopsis, and Hexaneurocarpon, and to Madagascar by reduction of the genus Kigelianthe. key six given to the six Indo-Malesian species, with references and specimens examined, and the necessary new are time. combinations are made. Domatia and stellate hairs recorded for the first Introduction of for During the investigation Bignoniaceae revision in Flora Malesiana, I felt the ne- cessity of examining continental Asian material ofRadermachera in conjunction with those of the Philippine Islands, especially the species described by P. Dop from Indo-China and by Merrill from Hainan and the Philippines. Besides held for time loan from the the Rijksherbarium collections I a very long a Arnold Arboretum, and a generous recent one. In addition I could borrow material from Kew, Edinburgh, Hong Kong, Michigan, Singapore, the U.S. National Herbarium, Washington, D.C., and from the Museum National d' Histoire Naturelle de Paris, for these loans vital which I am very grateful indeed, as included many type specimens, some ofwhich the known exist of bunch of unnamed only specimens to species. Among a large material graciously sent to me from Paris I foundmost interesting specimens, which led to rather radical, unexpected changes in the account of the Indo-Chinese Bignoniaceae. examined and Collecting numbers are only mentioned in so far as they have been as far as they will not be incorporated in a future Identification List of Malesian specimens. 1. RADERMACHERA Radermachera Zoll. & Mor. in Zoll., Syst. Verz. 3 (1854) 53, incl. sect. Alatae Steen., Acta Bot. Neerl. 2 (1952) 30. Bot. Lagaropyxis Miq., Ann. Mus. Lugd. Bat. 1 (1864) 198. Stereospermum pro sect. Radermachera et Xylocarpaea B. & H., Gen. PI. 2 (1876) 1047. For. D For. Burma K. MayodendronKurz, Prel. Rep. Veg. Pegu, App. (1875) pl. 1 & 2; Fl. 2 (1877) 232; Sch. Gin. in E. & P., Nat. Pfl. Fam. IV, 3b (1895) 244; Dop, Fl. I.—C. 4 (1930) 597; Chatterjee, Bull. Bot. Soc. For. Bot. 8. Beng. 2 (1948) 74; Santisuk, Thai Bull. 8 (1974) 122 BLUMEA VOL. 23, No. 1, 1976 Distribution: Sixteen species, in continental SE. Asia (India, Burma, Thailand, Indo-China, and S. China: Yunnan, Kwantung, Kwangsi, Hainan), Formosa, southern Ryu Kyu Is., and throughout Malesia except most Moluccas and New Guinea. have N otes. Apart from making reductions and describing three new species, I reduced the monotypic genus Mayodendron to Radermachera. with Radermachera hitherto The differences assumed were: occurrence of a false septum, ovules in two rows in each cell, a halfway spathaceous calyx, and cauliflorous short racemes. remarkable that these much It is statements were never well verified, although new material had been collected. Kurz's about the false rests Obviously, statement septum on is an erroneous observation taken from too young material; the septum at maturity fruit and similar those in Rader- terete and corky; valves, septum, seeds are exactly to The slits machera. ovules seem, if one the ovary along the attachment of the dissepiment, the and the flat side to be i-seriate, but, turning ovary 90° observing of the dissepiment, be attached in Also in the fruit the seeds in they appear to many rows. are many rows. Cauliflory was at Kurz's time unknown in Radermachera, but since that time R. cauliflora described from both also racemes insteadof the was Mt. Kinabalu; species possess panicles well be called that are usual in Radermachera. The halfway slit calyx cannot spathaceous, the veins indeed the but this ends in minute teeth close as are convergent to apex apex together; splitting of the calyx is often into irregular lobes. clear that Radermachera. As matter of It is, hence, Mayodendron igneum belongs to a shares also fact also in foliage it is closest allied to R. cauliflora with which it its orange-red flower colour. TENTATIVE KEY TO THE SPECIES OF RADERMACHERA AND ALLIED GENERA T. Corolla tubular, funnel-, or salver-shaped, without clear distinction of a cylindrical and rather widened or of the tube with the basal a abruptly ventricose upper part stamens attached in the throat. 2. Rachises narrowly winged and leaflets sessile; leaves 2-pinnate. Corolla tube curved, yellow with brown-red. Inflorescence not lacquered when young. Seeds in wingless. Septum thin. Calyx open bud, truncate. Pauldopia ghorta (Buch.-Ham. ex G. Don) Steen. Seeds 2. Rachises not winged. Corolla tube straight. thinly hyaline-winged. and covered with small 3. Leaves in pseudo-whorls, i-pinnate. Calyx capsule short tuberculate to warty glands. Capsule (c. 15 cm), ellipsoid or oblong; cruciform Santisuk septum in cross-section .... Barnettia pagetii (Craib) fruit 3. Leaves not in pseudo-whorls, 2- or 3-pinnate. Calyx and without warts or with tuberculate glands. Capsule terete, cylindric. Septum corky, impressions of seeds, but not cruciform by development of a pseudo-septum. Flowers almost reduced to almost always 4. in racemes, sometimes fascicles, lateral, ramiflorous. 5. Rachis of racemes terminal or axillary, very slender with widely spaced flowers, glabrous, 15—25 cm long. Calyx tubular, c. 10 by 4—5 mm at shortly in the middle with whorl of large glands. apex, very 2-lobed, a Corolla cm c. 0.8 cm wide at slender, c. 4—5 long, apex, yellow. Leaves i-pinnate 2. R. eberhardtii P. Dop with whorl of Leaves 5. Calyx otherwise, not halfway a glands. 2-pinnate. Corolla 6. 5 —7 cm long. and Fernandoa 123 C. G. G. J. van Stebnis : Radcrmachera cm 0.8—1 wide at 7- Calyx tubular, c. 2.5 long, cm mouth, glabrous, lobes shortly and irregularly 2- or 3-lobed at apex, c. 0.25 as long as the tube. Corolla tube slightly curved, widest at apex, with yellow limb. and red Racemes with thick rachis, up to 15 cm, glabrous. 12. R. ramiflora Stecn. tubular but slit 7. Calyx i.j—2(—2.5) cm long, halfway spathaceously, apex acutish with a few minute teeth or pointed. Corolla straight, 6 the tube —7.5 cm long, the upper portion of through a slight the contraction more or less barrel-shaped, widest below limb, and orange-yellow. Racemes very short, c. 1—2 cm, usually up to the short including calyx pubescent. 7. R. ignea (Kurz) Steen. Corolla not contracted below the its lower 6. 3 —4.5 cm long, limb, part enclosed by the calyx. Calyx 1.2—1.8 cm long, glabrous or puberulous, side Racemes mostly 3-lobed, but on one deeper to halfway. very short to terminal ramiflorous at the ends. up c. 3 cm, or mostly twig Calyx red, corolla yellow 6. R. hainanensis Merr. Flowers either terminal cm and white. 4. in thyrses, or only 3.5—4 long —8 8. Calyx in bud obconical, thick, glabrous, c. I cm long, the apex c. 7 mm wide, stunted or slightly convex, with 5 glandular bulges; when mature c. I.J cm long, conically narrowed above the glandular peak-shaped with bulges, and ending into two short lobes. Corolla yellow, narrow wide. tube, 5 —6 cm long, at apex c. 1 cm Leaves 2-pinnate. stellata 14. R. Steen. and 8. Calyx not inflated in the middle with 5 peak-shaped glandular bulges conically narrowed above these. 9. Corolla slender, 3.5—4.5 cm long. Corolla with tube wide. 10. a strictly cylindric 2.5—3 mm Calyx with lobes tubular, c. 1.5 cm long, 3 or 4 very short (c. 2 —3 mm). frondosa Chun & 3. R. How 6 10. Corolla tube gradually widening to the apex, c. —7 mm wide below the limb. Calyx c. 1 cm long, irregularly split into 2 or 3 lobes 4. R. gigantea (Bl.) Miq. 6 much 9. Corolla much larger, —7.5 cm or even longer. Calyx larger with much lobes. cm (2.5 —3 cm) and larger Capsule 0.8—1 wide, with sometimes woody valves. Corolla (pale) yellow (to creamy?). their 11. Stamens 5, glandular hairy at insertion. Calyx wide, campan- ulate, split halfway into acute lobes. Leaflets 7—ij(—30) cm long. 10. R. pentandra Hemsl. at their tubular 11. Stamens 4, glabrous insertion, didynamous. Calyx into rounded lobes. to bottle-shaped, split only to 0.25 blunt or Leaflets narrow, small, long-acuminate, c. 4—7 cm long. Deciduous (always?) tree 13. R. sinica (Hance) Hemsl. Corolla with a distinct basal and a rather widened of the 1. cylindric suddenly upper part tube, the stamens inserted in the throat. with small tuberculate 12. Leaves in pseudo-whorls, i-pinnate. Calyx covered or with warty glands. Capsule short, ellipsoid or oblong, scattered sunken glands, c. 15 cm. Thyrse sparsely stiff-stellate-hairy. Barnettiakerrii (Barnett & Sandw.) Santisuk 124 13LUMEA VOL. 23, No. I, 1976 12. Leaves not in pseudo-whorls.