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Project Name Data (Last Modified On 10/28/2012)

Flora Data (Last Modified On 10/28/2012)
PlaceOfPublication Suppl. 7. 1781.
Synonym Peperidium Lindl. Nat. Syst. 446. 1835. Ethanium 0. Ktze. Rev. Gen. 2:688. 1891
Description Rhizomatous herbs of mediocre to gigantic size; leaves distichous, with open ligulate sheaths; inflorescence paniculate, the branches scorpioid, rarely racemose, terminating the leafy stem, or scapose and arising directly from the rhizome; calyx tubular or turbinate, regularly 3-lobed or bursting irregularly at anthesis, usually more or less coriaceous or petalaceous; corolla tubular, 3-lobed; stamen not petalaceous; labellum more or less conspicuously 3-lobed; lateral staminodia absent or very inconspicuous; ovary inferior, 3-celled; ovules numerous; fruit a fleshy, irregularly dehiscent capsule.
Key a. Inflorescence terminating the leafy stem; bracts persistent in fruit, subcoriaceous - 1. R. CERNUA aa. Inflorescence terminating a bracted scape arising directly from the rhizome; bracts deciduous in fruit, membranaceous. b. Plants mediocre, 1-2 m. tall or less; flowers relatively small, the calyx 0.3-1.0 cm. long, persistent in fruit. c. Inflorescences obviously paniculate, the bracts subtending few to several flowers. d. Inflorescences thyrsiform, the bracts subtending an obvious secondary peduncle with few to several pedicellate flowers. e. Calyx turbinate, with a spreading throat and a markedly tapered base. f. Inflorescence relatively elongate and lax; leaves oblong- elliptic - 2. R. AROMATICA ff. Inflorescence relatively short and congested; leaves ob- lanceolate - 3. R. MEXICANA ee. Calyx urceolate, of about the same width throughout; in- florescence relatively elongate and lax; leaves oblanceolate - 4. R. CONCINNA dd. Inflorescence spiciform, the bracts subtending a fascicle of vir- tually sessile flowers, very congested and usually rather elongate; leaves obovate to oblanceolate; calyx turbinate - 5. R. COSTARICENSIS cc. Inflorescences racemiform, the bracts subtending solitary flowers. d. Leaves grass-like, 0.8-1.7 cm. broad; flowering scapes 7-10 cm. long - 6. R. ARUNDINARIA dd. Leaves obovate-elliptic, 3.5-7 cm. broad; flowering scapes 35-40 cm. long- 7. R. CHIRIQUINA bb. Plants massive, 3-5 m. tall; flowers relatively large, the calyx 1.5-2.0 cm. long, usually circumscissile in fruit. c. Flowering bracts membranaceous, oblong-lanceolate; corolla pink or red - 8. R. EXALTATA cc. Flowering bracts subcoriaceous, oblong-ovate; corolla cream - 9. R. RUBRO-FLAVA
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