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Drosera peruensis (Droseraceae), a New Species from Peru Tania Regina dos Santos Silva Depto. de Ciencias Biologicas, Universidade Estadual de Feira de Santana, BR 116, km 3, CEP 44031-460, Eeira de Santana, Bahia, Brazil. [email protected] Mireya D. Correa A. Herbario de la Universidad de Panama and Instituto Smithsonian de Investigaciones Tropicales, Apartado 2072, Balboa, \ncon, Panama Abstract. During a revision of the genus Drosera for Flora Neotropica, a new species was found. Drosera peruensis is described as new from Peru for the neotropics and is placed in D. subg. Drosera in section Drosera. It is characterized by the presence of elongated stems, leaves that become patent when old, obovate-oblong blades with distinct petioles, filamentous trichomes on the abaxial leaf surface, and inflorescence with filamentous trichomes. Key words: Drosera, Droseraceae, Peru. Drosera peruensis T. Silva & M. D. Correa, sp. nov. TYPE: Peru. Pasco: Oxapampa, Cordi¬ llera Yanachaga, Cerro Pajonal, “chacos” 12 km SE ol Oxapampa, 75°20'W, 20°35'S, 2700-2800 m. valley of Rio Yamaquizu, above Chacos to a microwave construction site, a footpath toward a crest behind the site toward a small lagoon, 7 Oct. 1982, R. B. Foster 9066 (holotype, PM A; isotypes, F, MO). Figures 1.2. Herba 4—11.5 cm alta. Caules elongati. 2-t cm longi. Folia rosulata, vinacea, matura pendentia, laminae oblon- gae, 4—7 mm longae, ad 1 mm latae. Inflorescentiae 1—2, vinaceae, 4—7 cm longae, flores 2-4; ovaria 3-carpel I aria, styli 3, profunde 2-partiti; stigmata 6, clavata. fructus capsularis, valvis 3; semina oblonga, reticulata. Herb, 4—1 1.5 cm tall; stem 2^4 cm long. Leaves reddish, patent when old, 10-12 cm long, blades obovate-oblong, 4-7 X 1 mm, adaxial surface vil¬ lous, glandular trichomes, abaxial surface densely villous, filamentous trichomes to 1 mm long, pale gold; petioles 6—7 X 1 mm, adaxial surface gla¬ brous, abaxial surface villous, filamentous tri¬ chomes, 2—2.5 mm long, pale gold; stipules rect¬ angular, membranaceous, ca. 7 mm long, laeiniate, laciniae ca. 6 mm long. Inflorescences 1 or 2. red- tinged, flowers 2 or 4, 4-7 cm long, villous, with filamentous trichomes, peduncle 3.5—6 cm long, pedicel reddish. Flowers with reddish sepals, 4 X Figure 1. Drosera peruensis T. Silva & M. D. Correa. — 1.5 mm, fused in lower Ft, abaxial surface villous, A. Habit. —B. Stipule. —C. Leaf. —D. Seed. (Foster with reddish filamentous trichomes to 1 mm long, 9066, PM A.) Novon 12: 543-545. 2002. 544 Novon Figure 2. SKM photographs of Drosera peruensis. —A. Leaf, abaxial surface detail. —B Seed. —C. Seed, surface detail. —I). Pollen, proximal view. —E. Pollen, pore detail. (Foster 9066, PM A.) Volume 12, Number 4 Silva & Correa 545 2002 Drosera oeruensis from Peru lobes oblong; petals white or red; ovary 3-carpel- Drosera peruensis is distinguished from D. chry¬ late, styles 3 bipartite to the base, stigmas 6, cla- solepis by having leaves with oblong-obovate blades vate. Fruit a 3-valvate capsule; seed oblong, testa 4—7 mm ong, a petiole 6—7 mm long, and rectan¬ reticulate. gular stipules, whereas D. chrysolepis has narrowly oblong blades 1-3 mm long, a petiole 2-5 cm long, The genus Drosera L. is distributed throughout and triangular stipules. The blades of Drosera per¬ Australia, America, and Africa, with a few species uensis are similar in shape to the obovate-oblong in Asia and Europe. Twenty species are found in ones in D. arenicola Steyermark. The new species the neotropics, concentrated in northern South has filamentous trichomes on the inflorescence, America (Venezuela, Guyana, Surinam, and French while D. arenicola has glandular trichomes. Guiana) and eastern Brazil. Two species are found Drosera peruensis is placed in Drosera subg. in Peru: D. chrysolepis Taubert and D. peruensis T. Drosera 1 ased on its subterraneous, non-tubercu- Silva & M. 1). Correa. late root system and in section Drosera because it Drosera peruensis is distinguished from all other is stipulated and has three styles divided to the Drosera species by the presence of elongated stems, base (Seine & Barthlott, 1994). patent leaves when old, obovate-oblong blades with Acknowledgments. We thank Robin Foster, distinct petioles and densely covered by filamen¬ Field Museum of Natural History, Chicago, for tous trichomes on the abaxial leaf surface, and the specimens from Peru and the Office of Fellowships inflorescence with filamentous trichomes. The area and Grants, Smithsonian Institution, Washington. where it was found was a shrubland on white sand¬ D.C., for T. Silva’s financial support. stone, with spongy Sphagnum humus up to 2 m deep, except where burned. The species was colo¬ Literature Cited nizing a sandy wet landslide on a steep slope, form¬ Seine, IT A W. Barthlott. 1994. Some proposals on the ing small pillars with old leaves and stems. It is infrageneric classification on Drosera L. Taxon 43: 583- only known from the type collection. 589.