, branched or unbranched, solitary or clustered. Roots
adventitious, thick. Stems woody, subterranean
], slender or massive, sometimes conspicuously enlarged and storing starch
and water, smooth
or covered with fibrous
or prickly remains of leaf bases
. Leaves spirally arranged
, often forming crownshaft
, sometimes with ligular appendages
, or ridged
or bearing prickles or marginal
teeth; hastula (flap of tissue
from petiole apex at junction with surface of blade
) absent or present adaxially, rarely present abaxially. Leaf blade palmate, costapalmate
(intermediate between palmate and pinnate), pinnate, or 2-pinnate [undivided]; plication
(folding lengthwise into pleats or furrows
) ^ - or tent-shaped (reduplicate
) or V-shaped (induplicate
, splitting along adaxial
ridges) ; segments lanceolate, linear
, or cuneate [rhombic
or variously scaly
, unarmed or bearing prickles (proximal
segments modified into spines in Phoenix) . Inflorescences from solitary [clustered] axillary buds, borne within, below, or above crown of leaves, paniculate
, rarely spicate
, usually branched to 1--5 orders
; prophyll (1st bract on main inflorescence axis
) 2-keeled; peduncular bract(s) (empty bract[s] between 1st prophyll and 1st bract subtending branch
) present [absent]; flowers bisexual
on same plants
or on different plants, or both bisexual and unisexual on same plant. Flowers solitary or variously clustered along rachillae of inflorescence, radially symmetric
; perianth 1--2-seriate; sepals [2--]3[--4], distinct
; petals [2--]3[--4], distinct or variously connate; androecium: stamens [3--]6--34[--1000]; filaments
distinct or connate or basally adnate
to petals; anthers
, dehiscing latrorsely or introrsely; staminodes in pistillate flowers distinct or variously connate or adnate to pistil or petals; pistils 1 or 3, distinct or partially connate, each bearing 1 ovule and 1 stigma, or 1 pistil bearing 1--3 ovules and 3 stigmas; styles distinct or connate, short; stigmas dry; pistillode
in staminate flower
present or absent. Fruits drupaceous
or berrylike; stigmatic
remains basal or apical; exocarp
smooth, warty, prickly, or hirsute
[corky or scaly]; mesocarp
or dry and fibrous; endocarp papery
, leathery, or bony, sometimes with 3 germination pores
. Seeds 1(--2+), free
or adhering to endocarp; seed coat
thin; endosperm homogeneous
, sometimes penetrated by seed coat; embryo basal, lateral
, or apical, peglike, minute; eophyll
(1st seedling leaf with blade) undivided and lanceolate or 2-cleft [pinnate].
Genera 1914, species ca. 2500 (19 genera, 29 species in the flora ) : worldwide, especially abundant in Central America, South America, se Asia.
Although palms appeared in various taxonomic schemes since the time of Linnaeus, the first attempt at a modern phylogenetic classification of the palms was published by H. E. Moore Jr. (1973) . Moore left his "major groups" unranked, and his untimely death in 1980 prevented his completing a formal synthesis. J. Dransfield and N. W. Uhl (1986) gave formal ranks to Moore€™s groups and divided the family into six subfamilies and numerous tribes and subtribes . Their Genera Palmarum (N. W. Uhl and J. Dransfield 1987, 1999) is a model of accuracy and completeness and will long serve the needs of the scientific, horticultural, and resource-management communities. With the advent of molecular techniques and a resurgence in palm research, however, realignments in the classification may be expected, and indeed additional data already require some changes in the current scheme (A. Barford 1991; R. G. Bernal et al. 1991; J. L. Dowe and N. W. Uhl 1989; J. Dransfield 1989, 1991; J. Dransfield and H. J. Beentje 1995, 1995b; A. Henderson and M. J. Balick 1991; N. W. Uhl and J. Dransfield 1999; N. W. Uhl et al. 1990, 1995.)
Modern cladistic analyses place the palms as the sister group to the Commelinanae clade (M. W. Chase et al. 1993; J. I. Davis 1995; M. R. Duvall et al. 1993b), with which they share ultraviolet-fluorescent phenolic compounds in their cell walls and Strelitzia-type epicuticular wax morphology (W. Barthlott and D. Frölich 1983; P. J. Harris and R. D. Hartley 1980) . Palms are currently treated as the sole representative of the superorder Arecanae , order Arecales (R. M. T. Dahlgren et al. 1985; R. F. Thorne 1992b) .
Morphologically the family is diverse and complex (see especially P. B . Tomlinson 1990) . The majority of palms produce a single indeterminate stem with axillary inflorescences; several noteworthy departures, however, also occur in numbers of vegetative and floral axes, position of inflorescence, and displacement of terminal bud. Stems may be solitary (monopodial) or clustered (sympodial), erect, prostrate , or lianoid. A majority of palms have unbranched vegetative axes, although aerial branching, sometimes dichotomous, is known in a variety of unrelated genera (e.g. , Korthalsia Blume, Nannorrhops H. Wendland) . Branching may also be nonaxiallary in some genera (J. B. Fisher et al. 1989) .
Studies of pollination (F. Borchsenius 1997; F. Ervik and J. P. Feil 1997; A. Henderson 1986; C. Listabarth 1992, 1993, 1993b, 1994; A. O. Scariot et al. 1991) indicate that insect pollination, especially by beetles (Coleoptera), bees and wasps (Hymenoptera), and flies (Diptera), is apparently more common than wind pollination. Bats (Chiroptera) play a role in the pollination of some species (S. A. Cunningham 1995) .
Dispersal of seeds is generally by means of animals for fleshy-fruited palms (S. Zona and A. Henderson 1989) . Many species of mammals include palm fruits in their diets (S. H. Bullock 1980; R. F. Harlow 1961; W. D. Klimstra and A. L. Dooley 1990; D. S. Maehr 1984; D. S. Maehr and J. R. Brady 1984), but birds also play a significant role. In the Eastern Hemisphere, Cocos Linnaeus and Nypa Steck have achieved a wide distribution as the result of dispersal by water. For the relationship between palms and seed-eating bruchid beetles (Bruchidae: Pachymerinae: Pachmerini), see C. D. Johnson et al. (1995) .
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 Ex Cavalier-Smith, 1998
- Vascular Plants
- Kenrick & Crane, 1997
- Class: Liliopsida () - Scopoli, 1760
- Infraphylum: Radiatopses () - Kenrick & Crane, 1997
- Subphylum: Euphyllophytina ()
- Phylum: Tracheophyta () - Sinnott, 1935 Ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Geonoma acaulis Mart. • Geonoma macrostachys Mart. var. acaulis (Mart.) Skov
Members of the genus Taenianthera
ZipcodeZoo has pages for 0 species, subspecies, varieties, forms, and cultivars in this genus:
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- Flora of Peru / by J. Francis Macbride. 13 1960 Chicago, [Ill.]: Field Museum of Natural History,  url p. 346, p. 352, p. 354.
- Index of American palms, by B.E. Dahlgren. Fossil palms, by A.C. Noé. 14 1936 Chicago, IL: Field Museum of Natural History1936-59. url p. 158, p. 372, p. 390, plate 403, p. 415, p. 419, p. 423, p. 428.
- Dransfield, J. and N. W. Uhl. 1986. An outline of a classification of palms. Principes 30: 3--11.
- Henderson, A. 1986. A review of pollination studies in the Palmae. Bot. Rev. 52: 221--259.
- Henderson, A., G. Galeano, and R. G. Bernal. 1995. Field Guide to the Palms of the Americas. Princeton.
- McClintock, E. 1993. Arecaceae [Palmae]. In: J. C. Hickman, ed. 1993. The Jepson Manual. Higher Plants of California. Berkeley, Los Angeles, and London. P. 1105.
- Moore, H. E. Jr. 1973. The major groups of palms and their distribution. Gentes Herb. 11: 27--141.
- Tomlinson, P. B. 1990. The Structural Biology of Palms. Oxford.
- Uhl, N. W. and J. Dransfield. 1987. Genera Palmarum. Lawrence, Kans.
- Zona, S. 1997. The genera of Palmae (Arecaceae) in the southeastern United States. Harvard Pap. Bot. 2: 71--107.
- Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
- Global Biodiversity Information Facility. Accessed January 18, 2008. http://www.gbif.org Mediated distribution data from 2 providers.
- Biodiversity Heritage Library NamebankID: 8809401
- Global Biodiversity Information Facility Taxonkey: 15058233
- Zipcode Zoo Species Identifier: 2989840