1953] 



BOTANY OF THE GUAYANA HIGHLAND 



107 



Specimens Fxamined: "In vicinibus Barra, Prov. Rio Negro," Spruce s. n. 

 (isotype of A. latifolia Spruce ex Benth.; NY); Manaos, Igarape do Crespo, Ducke 

 896. 



There are only two groups in the genus which have glabrous leaflets, this 

 variety and A. heterophylla, but the two are so unlike that there is no possibility 

 of confusion. In both this variety and var. pubescens the stipe is twice as long as 

 the ovary or longer, a condition seen otherwise only in A. insignis var. insignis 

 and A. polyphylla; the former has much larger flowers and the latter more and 

 narrower leaflets. 



4b. Aldina latifolia Spruce ex Benth. var. pubescens Cowan, var. nov. 



A var. latifolia ramulis, petiolis, rachibus, petiolulis, et foliolorum facie infe- 

 riore appresso-puberulentibus, foliolis maioribus (13.5-17.5 cm. longis, 6-7.5 

 cm. latis) differt. 



TYPE: "Prope San Gabriel da Cachoeira, ad Rio Negro, Brasiliae borealis, 

 Jan.-Aug. 1852," Spruce 2011; New York Botanical Garden. 



The specimen was cited by Bentham in the original publication of the species 

 but on the sheet itself Spruce implied in a note that it might represent a variety 

 of the species. The puberulent character of the vegetative parts separates this 

 variety from the typical variety. 



5. Aldina reticulata Cowan, sp. nov. 



Arbor; folia 1-3-foliolata, petiolis 2-9.5 cm. longis, rachibus 1-3.5 cm. longis, 

 petiolulis 0.8-1.5 cm. longis, foliolis oblongis vel late oblongo-ovatis, 7.5-18 

 cm. longis, 4.5~9 cm. latis, ad basim rotundatis, ad apicem acutis vel abrupte 

 brevi-acuminatis, extremitate valde obtusa, margine integris, supra glabris et 

 nitidis, infra sparse appresso-pubescentibus, pilis minutissimis, in facie supe- 

 riore costa leviter impressa et venis nerviisque conspicue salientibus, infra costa 

 venis nerviisque salientibus, venis primariis in paribus 8-9; inflorescentiae ter- 

 minales, 10-40 cm. longae, laxae, adscendentes, racemosae, bracteis triangulari- 

 bus, ca. 1 mm. longis, bracteolis ovatis, 0.6-0.8 mm. longis, pedicellis 3-6 mm. 

 longis; calyx ca. 1.5 cm. longus, plerumque in 3 partes inaequales recurvatas fis- 

 sus, petala 4, obovato-cuneata vel oblanceo-cuneata, 2-2.5 cm. longa, 1.0-1.8 

 cm. lata, glabra; stamina numerosa, filamentis glabris, ca. 1.5* cm. longis, anthe- 

 ris linearibus, 7 mm. longis, 1 mm. latis; stigma simplex, stylus crasso-subulatus, 

 3-6 mm. longus, ovarium valde appresso-pubescens, oblongo-ovale, 4-5 mm. Ion- 

 gum, 2-3 mm. latum, 3-5-ovulare, stipite articulato, crasso, ca. 2-5 mm. longo, 

 aureo-tomentello, infra glabro; fructus immaturus ovali-ellipsoideus, 2.5 cm. lon- 

 gus, 1.8 cm. latus, 1-seminifer, induratus, brunneo-pubescens. 



TYP E: small tree with white flowers, montane mixed forest above Cano Grande, 

 1 km. n. w. of Savanna Camp, Cerro Sipapo, Territorio Amazonas, Venezuela, 

 December 28, 1948, Bassett Maguire & Louis Politi 21913; New York Botanical 

 Garden. Paratypes: small tree with white flowers, savanna vicinity Base Camp, 

 Cerro Sipapo, December 30, 1948, Maguire & Politi 28046; small tree with white 

 flowers, savanna near Base Camp, Cerro Sipapo, February 8, 1949, Maguire & 

 Politi 28820. 



The relationship of this species is probably nearest A. latifolia, but it differs in 

 having the leaflets strongly reticulate-venose and the stipe of the ovary consider- 

 ably shorter. 



6. Aldina discolor Spruce ex Benth.; Mart. Fl. Bras. 15: (2) 12. 1870. 



Tree to 13 m. tall, the branchlets, petioles, petiolules, and inflorescences 

 appressed-puberulent; leaves mostly 5-foliolate, the petioles 3.5-4.5 cm. long, 

 the rachis 2-4 cm. long, the petiolules 6-9 mm. long, the blades' oblong-lanceolate, 



