Jorge Lingán1 & Thomas B. Croat2 This Is One of Several Anticipated
Total Page:16
File Type:pdf, Size:1020Kb
NEW SPECIES OF ANTHURIUM (ARACEAE) FROM THE PERUVIAN ANDES Jorge Lingán1 & Thomas B. Croat2 ABSTRACT (New species of Anthurium (Araceae) from the Peruvian Andes) Five new species of Anthurium are described from Peru: Anthurium chinchipense Croat & Lingán, A. hamiltonii Croat & Lingán, A. magdae Croat & Lingán, A. mariae Croat & Lingán, and A. piurensis Croat & Lingán. Key-words: new species, Anthurium, Peru, Andes. RESUMO (Novas espécies de Anthurium (Araceae) nos Andes peruanos) Neste trabalho são descritas cinco novas espécies para o Peru: Anthurium chinchipense Croat & Lingán, A. hamiltonii Croat & Lingán, A. magdae Croat & Lingán, A. mariae Croat & Lingán e A. piurensis Croat & Lingán. Palavras-chave: novas espécies, Anthurium, Peru, Andes. INTRODUCTION cm longus, 0.4–0.6 cm diam.; lamina 24–52 This is one of several anticipated papers cm longa, 14.4–37.4 cm lata, cordato- dealing with Peruvian Araceae. The authors sagitata; lobulas posterioribus (6.4) 7.8–15 have embarked on the preparation of an cm longus; nervis primariis lateralibus 6–8 updated checklist of the Peruvian Araceae utroque; pedunculus 10.3–22.7 cm longus, since the checklist published in 1993 by Lois 0.3–0.4 cm diam.; spatha viride, 7.3 cm lon- Brako and Jim Zarucchi (Croat 1993) is ga, 1.1 cm lata; spadix cinereo-viride, 8.3– already out of date and many more new 10 cm longus, 1.1–7 cm diam. species are yet to be described. Among the Description based on dried material. areas yet to be reported on is Oxapampa Terrestrial; roots 1–4 mm diam., white to which is currently the focus of investigations gray, short pubescent; stems short; by Rodolfo Vásquez (Missouri Botanical internodes up to 2 cm long, 0.9–2 cm diam., Garden) and his Peruvian colleagues. The terete; cataphylls 7.2–9.9 cm long, senior author has made a thorough revision subcoriaceous, triangular-lanceolate, brown of the Araceae of the Oxapampa region and to reddish brown, promptly withering into a has discovered a number of new species of mass of pale brown to reddish brown fibers. Araceae. During a recent two month long Leaves erect; petioles 23.2–70.2 cm long, research trip to the Missouri Botanical Garden 0.4–0.6 cm diam., (0.9) 1.2–1.5 times longer we were able to separate and determine many than the blade, U-shaped narrowly and previously undetermined plants and some of acutely sulcate with acute margins, sometimes these proved to be undescribed, including 2-ribbed abaxially; sheath up to 3.1 cm long; those reported in this manuscript. geniculum 1.3–2.7 cm long; blades drying subcoriaceous, 24–52 cm long, 14.4–37.4 cm Anthurium chinchipense Croat & Lingán, sp. wide, 1.1–1.3(1.6) times longer than wide, nov. Type: Peru. Cajamarca, Huarango, San wider at the base, cordate-sagitate, acute to Martín del Chinchipe, 5°19’17"S, acuminate at apex, bicolorous, olive-green 78°41’05"W, 900 m, 14 Sep. 1999, Campos above, brown to reddish brown below; et al. 6200 (holotype, MO; isotypes, B, K, margins straight to slightly convex; posterior NY, US, USM). Fig. 1a. lobes elliptic, markedly convergent, directed Planta terrestris; internodia usque ad 2 toward the base, (6.4) 7.8–15 cm long; sinus cm longa, 0.9–2 cm diam.; petiolus 23.2–70.2 widely hippocrepiform; midrib convex in Artigo recebido em 09/2004. Aceito para publicação em 06/2005. 1Museo Historia Natural, UNMSM, Lima, Peru. 2Missouri Botanical Garden. P.O. Box 299. St. Loius, MO 63166-0299, USA. e-mail: [email protected] 44 Lingán, J. & Croat, T. B. both surfaces, sometimes conspicuously and A. macleanii Schott (which is one of two narrowly acute below; primary lateral veins species it keys out with in the treatment of 6–8 per side, straight to arched-ascending, the Araceae for Peru (MacBryde 1936), but departing midrib at (30) 50–70° angle; basal A. macleanii has the blade margin much veins 5–10 pairs, fused all to the basal ribs; more concave on the anterior lobe and has a posterior ribs 3.5–11.1 cm long, recurved longer, more tapered spadix. The other toward the base, naked 2.9–9.2 cm along the species A. chinchipense keys out to in the Flo- sinus; collective veins arising usually from ra of Peru is A. monzonense Engl., which the uppermost lateral veins, rarely from the differs in having longer blades (65 cm) that 1st pair of basal veins, 1–6 mm from the are narrowly ovate with a more or less margins. Inflorescence erect; peduncle 10.3– spathulate sinus (versus triangular-sagittate 22.7 cm long, 0.3–0.4 cm diam., green, 0.3– with a broadly hippocrepiform sinus for A. 0.4 times longer than the petiole; spathe chinchipense). coriaceous, green, generally deciduous at Paratypes: PERU. CAJAMARCA: Huarango, fruiting, reflexed, 7.3 cm long, 1.1 cm wide, San Martín del Chinchipe, 5°19’17"S, lanceolate to oblong-lanceolate, attenuate at 78°41’05"W, 900 m, 14 Sep. 1999, Campos apex, cordate at base; spadix grayish green, et al. 6208 (CAS, F, G, MO, USM). cylindric, 8.3–10 cm long, 1.1–7 cm diam. at base, 0.4 cm diam. at apex, sessile; flowers Anthurium hamiltonii Croat & Lingán, sp. 4-lobed, margins sigmoid, 3 × 3 mm; 7–9 nov. Type: Peru. Pasco, Oxapampa Province, flowers visible on the principal spiral, 6–7 Parque Nacional Yanachaga-Chemillén, Sector flowers visible in the alternate spiral; tepals San Alberto, Refugio El Cedro, 10º33’46"S, with the inner margins broadly convex, outer 75º22’93"W, 2450 m, 13 Mar. 2003, J. Lingán margins 2-sided; pistils elliptic-obovate, 2.5 et al. 342 (holotype, MO; isotype, HOXA). mm long; stigmas rounded; stamens not Figs. 1 (b–d), 2. seen. Infructescence not seen. Planta terrestris vel hemiepiphytica; Anthurium chinchipense is known only internodia 7–20 mm longa, 1.9–2.1 cm diam.; from San Ignacio Province, and is endemic cataphylla 11.6–15.7 cm longa; petiolus to the locality of San Martín del Chinchipe 73.5–93.2 cm longus, 0.6–0.9 cm diam.; (thus the name “chinchipense”), at about 900 lamina ovata, 50–52.2 cm longa, 29.8–34.9 m elevation in Tropical lower montane rain cm lata, cordata ad basim; nervis primariis forest (TLM-rf) and the Tropical lower lateralibus 6–8 utroque; pedunculus 59.5– montane wet forest (TLM-wf). 69.7 cm longus, 0.5–0.7 cm diam.; spatha The species is a member of Anthurium ovata vel lanceolata, 12.5–16.5 cm longa, section Belolonchium and is distinguished by 6.4–7.2 cm lata, viride; spadix 6.4–7.8 cm its petioles with acute margins, broadly ovate longus, 0.9–1.1 cm diam., flavo-virescens vel leaves, as well as by the short peduncle and virellus. generally deciduous spathe. There is a Description based on dried material. collection from the same general area Terrestrial to hemiepiphytic; roots 2–3 mm (Rodríguez 1240) which represents a species diam., whitish to grayish brown; stem terete, that appears to be close to A. chinchipense, 1.9–2.1 cm diam.; internodes 7–20 mm long; but it has a brown spadix (versus green in A. cataphylls 11.6–15.7 cm long, obtusely 1- chinchipense), collective veins arising from ribbed, lanceolate, subcoriaceous, green to the 6th basal veins (instead of the 4th primary reddish, persistent as reddish brown to dark lateral vein in A. chinchipense), and occurs brown fibers. Leaves erect to spreading; up to 1240 m in elevation. petioles 73.5–93.2 cm long, 6–9 mm diam., Anthurium chinchipense is similar to terete to slightly sulcate, green; sheath 3.9 cm Rodriguésia 56 (88): 43-51. 2005 New species of Anthurium (Araceae) from the Peruvian Andes 45 a b c d Figures 1 - a. Anthurium chinchipense Croat & Lingán. Type specimen. (Campos et al. 6200); b-d. Anthurium hamiltonii Croat & Lingán; b. habit; c. leaf; d. inflorescence at anthesis, note the cylindric spadix subtended by the broad spathe. (Lingán et al. 342) Rodriguésia 56 (88): 43-51. 2005 46 Lingán, J. & Croat, T. B. m m 1 m m f 1 g m m e 1 c 1 cm m c 5 b m c 4 m 1 a c d 3 Figure 2 - Anthurium hamiltonii Croat & Lingán. a. Habit; b. leaf (abaxial view); c.petiole (cross section); d. inflorescence; e. pistil; f. stamen (anterior view); g. stamen (posterior view). Drawing by J. Lingán, based on several collections including Soukup 2328 (GH), C. Diaz et al. 3258 (MO) and Monteagudo et al. 4507 (MO). long; geniculum 1.2–1.4 cm long; blades ascending, departing midrib at 30°–50º; subcoriaceous, drying papiraceous, 50–52.2 basal veins 7–8 pairs, the 1st to 6th or 7th cm long, 29.8–34.9 cm wide, ovate, acuminate coalesced; posterior rib 8.3–8.7 cm long, to apex, deeply cordate at base, darker and curved, naked 6.3–6.7 cm along the sinus; semiglossy above, slightly paler and matte collective veins arising from the 4th or 5th pair below; posterior lobes oblong, convergent, of basal veins, 1–6 mm from the margin. 16.9–19.1 cm long, sinus rhombic to Inflorescence erect; peduncle 59.5–69.7 cm spatulate; midrib convex on both surfaces; long, 0.5–0.7 cm diam., green, 0.7–0.8 times primary lateral veins 6–8 per side, more longer than the petiole; spathe subcoriaceous, conspicuously convex below, arcuate- green, persistent, erect, 12.5–16.5 cm long, Rodriguésia 56 (88): 43-51.