EcoFlora - Arisaema

Arisaema
Family: Araceae Paul Rothrock	FNA Gleason & Cronquist Resources Sue A. Thompson in Flora of North America (vol. 22) Herbs, terrestrial or wetland. Corms [rhizomes] nearly globose. Leaves usually appearing with flowers, 1--2(--3), erect; petiole longer than blade; blade medium to dark green, sometimes glaucous adaxially, palmately or pedately [radiately] divided, not peltate, leaflet elliptic to broadly ovate or oblanceolate, base rounded to obtuse or attenuate, apex obtuse or acute to acuminate; primary lateral veins of each leaflet pinnate. Inflorescences: peduncle erect, nearly equal to leaves [to very short], apex not swollen; spathe variously colored or striped, distal part open at maturity, exposing tip to 1/2 or more of spadix appendage; spadix ± cylindric, surmounted by sterile appendage of variable shape. Flowers unisexual, staminate and pistillate on same or different spadix; pistillate flowers congested; staminate flowers usually scattered, distal to pistillate flowers when both are present; perianth absent. Fruits not embedded in spadix, glossy orange to bright red. Seeds 1--6, mucilage sometimes present (not present in Arisaema triphyllum). x = 13, 14. The phenomenon of sex changing in Arisaema has been investigated by many authors (e.g., P. Bierzychudek 1982; K. Clay 1993; E. Kinoshita 1986). Smaller plants produce only staminate flowers, and larger plants produce either staminate and pistillate flowers simultaneously or pistillate flowers only. Changes in gender expression are directly correlated with size and are also influenced by the environment in which the plants are growing. Reversions in phenotypic gender have been experimentally induced by such factors as removing leaf area or changing soil nutrient levels. Although some species are cultivated as ornamentals, the genus is not of great economic importance. Vascular plants of NE US and adjacent Canada Monoecious or dioecious; fls covering the basal part of a fleshy spadix that is subtended by a green or purple-brown spathe; perianth none; staminate fls above the pistillate, composed of 2-5 subsessile anthers opening apically; pistillate fls consisting of a unilocular ovary with 1-several basal orthotropous ovules and a broad stigma; fr a cluster of globose red berries, each with 1-3 seeds; cormose perennials with long-petioled compound lvs. 150, irregularly cosmop. Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp. ©The New York Botanical Garden. All rights reserved. Used by permission.
Species within checklist: NYC EcoFlora - Historical and rare collections (version Aug 2018) \|\| << 1 - 50 taxa >> Arisaema acuminatum Map not Available Arisaema addis-ababense Media not available Map not Available Arisaema aequinoctiale Media not available Map not Available Arisaema amurense Map not Available Arisaema angustatum Map not Available Arisaema aridum Media not available Map not Available Arisaema atrorubens Map not Available Arisaema auriculatum Map not Available Arisaema bockii Media not available Map not Available Arisaema calcareum Media not available Map not Available Arisaema candidissimum Map not Available Arisaema ciliatum Media not available Map not Available Arisaema concinnum Map not Available Arisaema consanguineum Map not Available Arisaema cordatum Media not available Map not Available Arisaema costatum Media not available Map not Available Arisaema curvatum Map not Available Arisaema dahaiense Map not Available Arisaema dracontium Map not Available Arisaema dulongense Map not Available Arisaema echinatum Map not Available Arisaema ehimense Media not available Map not Available Arisaema elephas Map not Available Arisaema enneaphyllum Media not available Map not Available Arisaema erubescens Map not Available Arisaema exappendiculatum Map not Available Arisaema filiforme Map not Available Arisaema fimbriatum Map not Available Arisaema flavum Map not Available Arisaema formosanum Map not Available Arisaema franchetianum Map not Available Arisaema galeatum Map not Available Arisaema grapsospadix Media not available Map not Available Arisaema griffithii Map not Available Arisaema hainanense Media not available Map not Available Arisaema heterocephalum Media not available Map not Available Arisaema heterophyllum Map not Available Arisaema intermedium Media not available Map not Available Arisaema ishizuchiense Map not Available Arisaema iyoanum Media not available Map not Available Arisaema jacquemontii Map not Available Arisaema japonicum Map not Available Arisaema kishidae Media not available Map not Available Arisaema kiushianum Media not available Map not Available Arisaema leschenaultii Media not available Map not Available Arisaema lichiangense Map not Available Arisaema limbatum Media not available Map not Available Arisaema lingyunense Media not available Map not Available Arisaema lobatum Media not available Map not Available Arisaema longipedunculatum Media not available Map not Available