EcoFlora - Asparagus

Asparagus
Family: Asparagaceae Anne Barber	FNA Gleason & Cronquist Resources Gerald B. Straley+ & Frederick H. Utech in Flora of North America (vol. 26) Herbs, shrubs, or vines, perennial, from rhizomes, usually with fusiform tubers, often with fernlike appearance. Stems photosynthetic, erect, spreading or climbing, branched; cladophylls solitary or fasciculate, in nodes of reduced, scarious leaves. Leaves small, scale-like, membranous, or sometimes spiny with hardened base, subtending cladophylls. Inflorescences axillary or terminal, racemose, or umbellate, paired or solitary; racemes short. Flowers bisexual or unisexual; perianth greenish, white, or yellowish, campanulate to rotate; tepals 6, distinct or shortly connate basally, equal; stamens 6, distinct, equal; anthers versatile, 2-locular, dehiscence introrse; ovary superior, 3-locular, septal nectaries present; style 3-branched distally; pedicel with conspicuous joint. Fruits baccate, red or purplish black, globose, often with tepals persisting at base. Seeds 1-6, black, globose to angular. x = 10. Asparagus is a moderately important horticultural genus, with one species commonly grown for its edible young shoots and a number of others grown ornamentally. The genus is treated here in a broad sense (K. Kubitzki and P. J. Rudall 1998; W. S. Judd 2001) and encompasses species that have been segregated in several genera (A. L. Takhtajan 1997; S. T. Malcomber and Sebsebe D. 1993). Embryological features (P. J. Rudall et al. 1998) and DNA-based analyses (M. W. Chase et al. 1996; M. F. Fay et al. 2000; P. J. Rudall et al. 1997) support the monophyly of Asparagus and the Asparagaceae. Asparagus virgatus Baker has been collected once as a garden escape in East Baton Rouge Parish, Louisiana, but it is probably not truly naturalized in the flora. Asparagus falcatus Linnaeus occasionally persists after cultivation in the Miami-Dade County area of southern Florida (W. S. Judd 2001). Vascular plants of NE US and adjacent Canada Fls perfect or unisexual; perianth tubular to campanulate, the tep separate or united; stamens 6, inserted on the base of the perianth; filaments slender; anthers oblong, introrse; ovules 2 in each of the 3 locules; style slender; stigmas 3, short; fr a berry with a few large rounded seeds; herbs with the lvs reduced to inconspicuous scales and replaced functionally by branches incapable of further growth and sometimes flattened and lf- like in appearance; fls small. 300, Old World. 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.
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