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152 FIELDIANA: BOTANY, VOLUME 28 COMME LINAGEAE Aneilema gracilis (H.B.K.) Steyermark, comb. nov. Tradescantia gracilis H.B.K. Nov. Gen. & Sp. 7: 261. pL 672. 1825. Aneilema gracilis, forma bicolor (Kunth) Steyermark, comb. nov. Tradescantia gracilis Phan. 3: 298. 1881. p bicolor (Kunth) C. B. Clarke in DC. Mono. Tradescantia b ico lor Kunth, Enum. 4: 88. 1843. South-facing slopes of Cordillera del Avila, just above Caracas, along trail towards Los Venados, Distrito Federal, alt. 1520-1675 m., Steyermark 55027. The stamens in this collection are 6 in number, all fertile, equal and similar, and barbate in the lower third. So far as the 6 equal stamens are concerned, the collection matches H.B.K's plate 672 of Tradescantia gracilis. Phaeosphaerion pseudomonosperma (O. Ktze.) Steyermark, comb. nov. Athyrocarpus Pseudomonosperma O. Ktze. Rev. Gen. PI. 3, pt. 2: 319. 1898. Monagas: Montana de Aguacate, along Quebrada de Pajarral, tributary to Rio Caripe, northeast of Alto de Aguacate, between Caripe and Caripito, alt. 600-900 m., Steyermark 62217. Tradescantia venezuelensis Steyermark, sp. nov. Perennis, caulibus erecto-adscendentibus, basi decumbentibus, glabris, 40 cm. longis; foliis membranaceis, oblongo- vel ovatolanceolatis, acutis, basi obtusis vel rotundatis valde asymmetricis, supra viridibus, subtus argenteo-viridibus, 3-5- 7 cm. longis, 1.5- 2.5 cm. latis, utrinque pilosis; vaginis 5-8 mm. longis, 3-5 mm. latis, marginibus apicibusque ciliatis, apice oblique truncatis; pedunculis 1.5-3.5 cm. longis uno latere dense pilosulis; bracteis 2, subaequalibus, cordato-ovatis, obtusis, 12-13 mm. longis, 12 mm. latis, marginibus dense ciliatis; sepalis ovato-oblongis, obtusis, falcato-asymmetricis, 3 mm. longis, sepalorum 2 tenuibus glabris, tertio uno latere carinato, carina ciliata; petalis albis, 2 mm. longis, obtusis vel rotundatis; staminibus 6, 3 brevioribus; filamentis glabris, ad 2 mm. longis; stylo filiform!, in fructu persistenti, glabro, 1-2 mm. longo; se minibus 4, oblongis vel quadrato-rhomboidalibus, griseobrunneis, 1.25-1.5 mm. longis, 0.75- 1 mm. latis, uno latere plus minusve 12-scrobiculato, e contrario reticulate cicatrice hilari elongata. Type in herb. Chi. Nat. Hist. Mus., collected between La Trinidad and headwaters of Rio de Amana, Cerro Tururaiquire, state of Sucre, alt. 1300-1800 m., May 10, 1945, Julian A. Steyermark 62688.
BOTANICAL EXPLORATION IN VENEZUELA - I 153 Known locally as "Suelda con sue Ida". Characterized by the glabrous filaments, small white petals, tiny sparsely pilosulous sepals, small size of seeds, strongly inequilateral base of leaves, small bracts subtended on one side by a leaf, and short pedicels, this species is related to Tradescantia commelinoides Roem. & Sch. of Central America and Mexico. From this species, it differs, among other respects, in its white petals. It is related to T cymbispatha Clarke, from which it differs in the much smaller seeds, more densely pubescent bracts, smaller petals and sepals, inequilateral leaves, shorter pedicels, and filaments all glabrous. From T. anagallidea Seub. and T. fluminensis Veil, it may be distinguished by the asymmetric narrowed leaf base, smaller flowers, shorter pedicels, and glabrous filaments. LILIACEAE Excremis coarctata (R. & P.) Baker, forma alba Steyermark, f. nov. A typo recedit petalis alb is. Type in herb. Chi. Nat. Hist. Mus., collected on ascent of Pico de Naiguata, above Los Chorros, state of Miranda, alt. 2200-2765 m., June 16-17, 1945, Julian A. Steyermark 62963. This differs from typical E. coarctata in the white, instead of blue, petals. Nietneria paniculate Steyermark, sp. nov. Herba perennis; foliis erectis, caeruleo-viridibus, linearibus, falcatis, angustate acuminatis, firmiter 10-costulatis, 7-17 cm. longis, 1.5-3.5 mm. latis, vaginis equitantibus; inflorescentia paniculata, 1.5-7.5 cm. longa, 1.5-2 cm. lata, pedicellis 8-13 mm. longis, erectis; bracteis infimis 4.5-6 mm. longis; perianthio superne flavo, parte inferiore olivaceo-viridi, hypanthio late conico, 2 mm. longo, segmentis 5 mm. longis, exterioribus 1.5 mm. latis, interioribus 1.75-2 mm. latis, marginibus scariosis albidis 0.5 mm. latis, subaequalibus, lanceolatis, acutis, apice paullo incurvatis, 5-7-nervatis; filamentis subulatis, 3 mm. longis; antheris oblongis, 1.1 mm. longis; ovario late conico, 3mm. longo sursum sensim angustato. Tips of leaves long- or narrowly acuminate; the 2-3 bracts of the scape above the lowest folia ceous bract poorly developed and reduced in size; inflorescence elongated paniculate, the flowers rather remotely separated; perianth segments 6, the inner 5-7-nerved with scarious whitish margins, the outer 7-nerved; bracts at base of lowest flowering branches 4.5-6 mm. long; stigmas subcapitate; styles 1 mm. long. Type in herb. Chi. Nat. Hist. Mus., collected in Gran Sabana, between Mission of Santa Teresita de Kavanayen northwest to Rio Karuai, on large mesa, state of Bolivar, alt. 1220 m., October 26, 1944, Julian A. Steyermark 59362.
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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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