Cuphea carthagenensis |
Lythraceae |
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Colombian waxweed |
loosestrife family |
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Habit | Herbs annual, [subshrubs], 1–6 dm, with fibrous roots. | Herbs, annual or perennial, shrubs, subshrubs, or trees, terrestrial, amphibious, or aquatic, usually unarmed (armed in Punica), rarely glaucous, clonal or not. | ||||||||||||||||||||||||||||||||||||||||
Stems | erect to decumbent and spreading, usually much-branched, hispid and setose, sometimes also puberulent. |
erect, decumbent, lax, spreading, creeping, trailing, floating, or submerged, young ones often 4-angled. |
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Leaves | opposite, subsessile or sessile; petiole 0–2 mm; blade broadly elliptic to lanceolate, 12–55 × 5–25 mm, base attenuate. |
deciduous, usually opposite, sometimes alternate, subalternate, or whorled, simple, rarely dimorphic, emergent and submerged leaves dissimilar; stipules usually absent; sessile, subsessile, or petiolate; blade membranous [leathery], venation brochidodromous, each marginal vein forming a series of loops, margins entire (except coarsely toothed in Trapa), trichomelike glands present in axil at petiole base. |
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Racemes | leafy. |
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Inflorescences | indeterminate or determinate, terminal or axillary, racemes, spikes, cymes, panicles, [thyrses], or flowers solitary; bracts absent (except present in Cuphea aspera); bracteoles present, paired on pedicels. |
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Pedicels | 1–2 mm. |
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Flowers | alternate, 1 interpetiolar, with 1–3 flowers on axillary branchlets; floral tube purple adaxially and distally, or green throughout, 4–6 × 1–1.5 mm, glabrous except veins sparsely and coarsely setose; base rounded or a descending spur, 0.5 mm; inner surface glabrous; epicalyx segments thick, often terminated by a bristle; sepals equal; petals 6, deep purple or rose purple, subspatulate, subequal, 1.5–2.5 × 0.5–1 mm; stamens 11, extending 2/3 distance to sinus of sepals. |
bisexual [unisexual], actinomorphic or zygomorphic; perianth and androecium usually perigynous (semi-epigynous to epigynous in Punica, perigynous to semi-epigynous in Trapa), mono-, di-, or tristylous; floral tube or cup persistent, campanulate, turbinate, urceolate, cylindrical, or obconic, green (except red or yellow in some Cuphea and Punica), sometimes conspicuously ribbed; sepals persistent, 4–8, valvate, usually deltate, sometimes subulate in Lythrum, alternating with segments of epicalyx or epicalyx absent; petals usually caducous or deciduous, rarely persistent, 0–8, distinct, on interior margin of floral tube between sepals, crinkled, pinnately-veined; nectary present as distinct organ, as nectariferous tissue in wall of ovary or floral tube, or absent; stamens (1–)4–42[+], usually equal to or 2 times number of petals, usually in 2 whorls of unequal length, sometimes 1 whorl; anthers versatile [or basifixed], introrse, 2-locular, longitudinally dehiscent; pistil 1; ovary usually superior (semi-inferior to inferior in Punica and Trapa), 2–6-locular (to 9 twisted locules in Punica); placentation axile, placenta elongate or globose; septa incomplete near ovary apex (reduced to thin threads in Cuphea); style 1; stigma 1, capitate to punctiform, dry (wet in Heimia, Lagerstroemia, and Punica); ovules 1–1400, anatropous, bitegmic. |
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Fruits | capsules, walls usually thin and dry (thick in Decodon, woody in Lagerstroemia), or leathery berries (Punica), or indurated, 2–4-horned drupes (Trapa), usually smooth (striate in Rotala), dehiscence loculicidal, septicidal, or septifragal, or indehiscent and splitting irregularly. |
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Seeds | (4–)6(–9), elliptic to suborbiculate in outline, 1.5–1.7 × 0.2–1.5 mm, margin narrow, flattened, thin. |
3–250(–1400), usually brown (wine in Punica) [black, red], narrowly obovoid to fusiform, oblong to pyramidal, obovoid-semiovoid, semiorbicular, suborbicular, or elliptic (in outline), usually dry, fleshy in Punica, winged or not; endosperm not developed; embryo straight, oily, cotyledons usually ± complanate, rarely rolled, often auriculate or cordate. |
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2n | = 16. |
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Cuphea carthagenensis |
Lythraceae |
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Phenology | Flowering late spring–fall. | |||||||||||||||||||||||||||||||||||||||||
Habitat | Atlantic and Gulf coastal plain, ditches, margins of moist woods, roadsides, moist open, disturbed areas. | |||||||||||||||||||||||||||||||||||||||||
Elevation | 0–200 m. (0–700 ft.) | |||||||||||||||||||||||||||||||||||||||||
Distribution |
AL; AR; FL; GA; LA; MS; NC; SC; TN; TX; Mexico; Central America; South America; ditches; disturbed areas; moist open; roadsides; margins of moist woods; Atlantic and Gulf coastal plain [Introduced in North America; introduced also in Pacific Islands (Fiji, Guam, Hawaii, Philippines), Australia]
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North America; nearly worldwide; mostly in tropical and subtropical areas |
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Discussion | The weedy, self-fertilizing Cuphea carthagenensis is the most widely distributed species of the genus and one of the more common in South America. It was first collected in the United States in Florida and North Carolina in the 1920s. Fossilized pollen very similar to pollen of C. carthagenensis and close relatives is known from the late Miocene of Alabama (S. A. Graham 2013). The species flowers year-round in subtropical and tropical regions. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Genera 28, species ca. 600 (10 genera, 32 species in the flora). Lythraceae are widely distributed in both hemispheres, generally in wet habitats, with limited temperate representation. Taxa of Lythraceae in the flora area range in elevation from coastal plain to mid montane. Elevational ranges of the species are approximations based on regional topography taken from collection data where possible. Lythraceae (order Myrtales) have recently been expanded to include the previously recognized families Duabangaceae, Punicaceae, Sonneratiaceae, and Trapaceae. Together they form a monophyletic family sister to Onagraceae (S. A. Graham et al. 2005). The traditional, more narrowly defined family (E. Koehne 1903) was divided into two tribes and four subtribes, a classification not supported by morphological or molecular phylogenetic evidence (Graham et al. 2011). Lythraceae are notably among only 28 angiosperm families that have evolved a heterostylous breeding system and one of three families in which the tristylous condition has evolved (S. C. H. Barrett et al. 2000). Six genera (Adenaria, Ammannia, Decodon, Lythrum, Pemphis, and Rotala) have distylous and/or tristylous species. Seed coats of many of the genera possess mucilaginous trichomes in the outermost cell layer that evaginate upon wetting, coming to resemble fungal growth. In Cuphea and in some genera outside the flora area, the trichomes reach half the length of the seeds and are spirally twisted. Floral merosity is highly variable in the family, and it is common to find a range of merosity in flowers of a single plant or within a population. The most frequent states are 4- and 6-merous. Only Decodon is commonly 5-merous. Submerged portions of the stems of the marsh-inhabiting genera Ammannia, Decodon, Lythrum, and Trapa can develop external spongy, aerenchymatous tissue that enhances oxygen exchange to the interior. Some genera are widely cultivated: Cuphea and Lagerstroemia as landscape and garden plants, Punica for the pomegranate fruit, and Lawsonia for the leaves from which henna dye is obtained. Trapa and some species of Lythrum and Rotala can be invasive and pose significant problems for wetlands and river systems in North America. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 10. | FNA vol. 10. | ||||||||||||||||||||||||||||||||||||||||
Parent taxa | Lythraceae > Cuphea | |||||||||||||||||||||||||||||||||||||||||
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Synonyms | Lythrum carthagenense, Balsamona pinto, C. balsamona, Parsonsia pinto | |||||||||||||||||||||||||||||||||||||||||
Name authority | (Jacquin) J. F. Macbride: Publ. Field Mus. Nat. Hist., Bot. Ser. 8: 124. (1930) | J. Saint-Hilaire | ||||||||||||||||||||||||||||||||||||||||
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