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214 FIELDIANA: BOTANY, VOLUME 28 Inflorescentiae masculae axillares subterminales cymoso-paniculatae 2.5-4 cm. longae pluriflorae, pedunculis tenuibus rigidis paculis 15-25 mm. longis tomentuloso-puberuli, ramulis elongatis brachiatis graciles saepe 2-fvircatis, 8-5 mm. longis, coraentellis. Pedicelli 2-7 mm. longi graciles tomentelli. Capitula globosa 2.5-3 mm. diam. fulva. Sepala facie glabra margine ciliata. Antherae maturicate subezsertae. Type in herb. ChL Nat. Hist. Mus., collected along mesa escarpment between Santa Teresita de Kavanaye'n and wooded quebrada about 8 kms. northwest of Kavanayen, alt. 1220 m. f November 23, 1944, Julian A. Steyermark 60456, "small tree 25 feet tall; leaves subcoriaceous, rich deep green above, pale green below; flowers buff-brownish, sap slightly milky". This species is well characterized by its small obovate-oblong, subcoriaceous leaves which are obtuse at both ends, and glabrous except on the slightly hirtellous principal nerves beneath. The most similar species, C. orthoneura St., and C, cuneata Miq., have thicker, larger, more or less acuminate leaves, not reticulate nerved; in this last species the male capitules are smaller too. Coussapoa viridifolia var. tenuifolia Cuatr., var. nov. Lamina foliorum membranacea obovato-oblonga basi obtusa apice rotundata breviter emarginata, 4-8 cm. longa, 2-4 cm. lata pallide viridis, nervis principalibus subtus parce hirtulis reliqua glabra, non elevato-reticulata. Inflorescentiae femineae cymulis 1-2-cephalis, pedunculis 6-10 mm. longis, capitulis 2 mm. lads, perianthio glabro, stigmate penicillati exserto. Type in herb. Chi. Nat. Hist. Mus., collected on Cerro Duida, on the southeastern-facing slopes along Cano Negro (tributary of Cano Iguapo), alt. 305-1095 m., August 25-26, 1944, Julian A. Steyermark 57955, "tree 40 feet tall; leaves firmly membranaceous, pale grass green above, pale green below; inflorescence pale green*'. This variety of C. viridifolia substantially differs by its slightly smaller, more slender leaves which do not have an elevated venosereticulum, and by the shorter inflorescences; these, being feminine, cannot be compared with those of the typical species. Coussapoa Williams!! Cuatr., sp. nov. Arbor parva terrestris vel epiphytica. Ramuli subteretes virides, in sicco brunnescenti. Folia simplicia integra alterna petiolata coriacea. Petiolus 3*5-5 cm. longus glaber striatus. Lamina subobovato-oblonga basi attenuata obtusa apice angustata cuspidata, margine levissime crenatosinuata vel laevis leviter revoluta, 10-13 cm. longa, 4-7 cm. lata; supra in sicco luteolo-viridula vel brunnescens, glabra costa promi-
BOTANICAL EXPLORATION IN VENEZUELA - I 215 nula nervis secundariis notatis, superficie minutissime rugulosoreticulata punctate depressa vel adultioribus sublaevi; subtus costa crassa elevata striata parce puberula, nervis secundariis 5-7 utroque latere prominentibus ascendentibus ad marginem curvato anastomosatis, parce puberulis vel in adultis glabris, nervulis transversis subimmersis depressis tenuiter conspicuis inter eos venulis minutum reticulum subtus microscopium visibilera formantibus , epiderrao inter lineas reticulorum minute bullato-elevato et praecipue in statu juvenile minutissime hirtula adultiore glabra. Stipulae cylindraceolanceolatae 2.5 cm. longae acutae pubescentes. Inflorescentiae masculae cymoso-paniculatae pluriflorae, axillares subterminales 3-4 mm. longae, pedunculo tenui puberulo ramulis divaricatis plus minusve flexuosis puberulis vel tomentellis, pedicellis teneribus 1-4 mm. longis. Capitula subglobosa 2-3 mm. lata. Perianthium glabrescente apice minute sparseque puberulum. Antherae subexsertae. Type in herb. Chi. Nat. Hist. Mus., collected in the Upper Orinoco river at Esmeralda, Territorio Federal Amazonas, alt. 143 m., May 14, 1942, Llewelyn Williams 15240 & 15363. Closely related to C. cuneata Miq., which has thicker, coriaceous leaves, toraentulose or arachnoid beneath, smaller male capitules, longer pedicels, and long exserted anthers. Coussapoa cornifolia Standl. has the under side of the ovate acute leaves tomentulose, somewhat smaller capitules, and exserted anthers. Coussapoa orthoneura Standl. has more acute ascending nerves of the leaves, smaller male capitules, and different structure of the epidermis of the lower side of the leaf, which is more or less tomentulose and arachnoid, although in the old state can be nearly glabrous, but, by means of a microscope, the epidermis is seen to consist of minute spreading hairs with rather depressed alveoles between the reticulum. The more lanceolate stipules, which are only slightly pubescent, differentiate C.Williamsii from the above cited species. Pseudolmedia rigida (Kl. & Karst.) Cuatr., comb. nov. Olmedia rig id a Klotsch & Karsten. Linnaea 20: 524. 1847. MONAGAS: forested southwest-facing slopes of Cerro Negro, above La Sabana de las Piedras, northwest of Caripe, alt. 1500 m., April 5, 1945, Julian A Steyermark 61846, "tree 80 feet tall; wood very hard; latex creamy-yellow; leaves chartaceous-subcoriaceous, dark green and shining above, dull green below". ANZOATEGUI: forested slopes of Montana de las Palomas, tributary of Rio Never/, between "Carmelita" and "Natalia", northeast of Bergantin, alt. 900-1000 m., March 23, 1945, Steyermark 61447, "tree 25 feet tall; leaves chartaceous-firmly membra naceous, dark green above, dull green below; flowers dull green". Headwaters of Rio Maravilla, slopes of Fila Grande between Los Chorros and Cerro Negro, east of Bergantin, alt. 900-1400 m., March 23, 1945, Steyermark 61714, "tree
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o 2 CM XI E> RAR.Y OF THL UNIVERSIT
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FIELDIANA: BOTANY A Continuation of
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NUMBER 1 LIST OF ILLUSTRATIONS TEXT
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PAGE 67. Emmotum ptarianum 342 68.
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CONTRIBUTIONS TO THE FLORA OF VENEZ
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BOTANICAL EXPLORATION IN VENEZUELA
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