STUDIES IN BIGNONIACEAE 26: NEW TAXA AND COMBINATIONS IN NORTHWESTERN SOUTH AMERICAN BIGNONIACEAE Alwyn H. Gentry* Missouri Botanical Garden My on-going studies of neotropical Bignoniaceae have turned up five undescribed taxa of this family from western Ecuador and adjacent Peru. Several new combinations in the family are also proposed as a result of taxonomic insight gained from field work in northwestern South America. AMPHILOPHIUM ECUADORENSE A. Gentry, sp . nov. Frutex scandens; ramuli hexagoni, pilosi, sine consociebus glandularum in nodis inter petioles; pseudo-stipulae foliaceae; folia 2-foliolata, interdum cirrhis fissis, foliolis ovatis, membranaceis , subtus dense puberulis; inf lorescentia floribus in panicula angusta, villosa; calyx duplex, pubescens; corolla rubra, tubulosa, valde bilabiata; stamina didynama, thecis divaricatis; ovarium ovato-cylindricum, dense puberulum; discus annulo-pulvinatus ; capsula elliptica, rasilis, dense molliter tomentosa. Liana; branchlets sharply hexagonal with ribbed angles, pilose, especially on the angles with simple or short-branched dendroid yellowish trichomes, these less than 1 mm long, interpetiolar glandular fields lacking; pseudostipules foliaceous, persistent, to 0.8 mm in diameter. Leaves 2-foliolate, sometimes with a trifid tendril, the leaflets ovate, acute, cordate at base, 4-12 cm long, 2.5-12 cm wide, membranaceous, palmately veined at base, densely and uniformly yellowish-puberulous beneath with short dendroid trichomes, above less densely puberulous with short simple and forked trichomes; petiolules 1-4 cm long, petioles 2-6 mm long, villous with short-branched dendroid trichomes. Inflorescence a rather narrow panicle, villous with yellowish mostly dendroid trichomes, bracteate with linear or lanceolate bracts 0.5-1 cm long. Flowers with calyx double, the inner calyx irregularly 2-labiate, outer calyx irregularly 5-lobed, lepidote and yellowish-pubescent with simple, forked and dendroid trichomes, the latter mostly branched only at tips, 9-11 cm long, 10-11 cm wide; * This work was supported by National Science Founda-tion Grants GB-40103, OIP75-18202 and DEB 75-20325-A01. 183
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