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Lythrum tribracteatum

Higher Taxonomy
Family: LythraceaeView DescriptionDichotomous Key

Common Name: LOOSESTRIFE FAMILY
Habit: Annual, perennial herb, shrub, tree. Stem: 4-angled or cylindric. Leaf: simple, entire, generally opposite, 4-ranked (alternate, whorled). Inflorescence: flowers terminal or in axils of upper leaves or leaf-like bracts, 1 or in +- dense cymes or along short shoots, sessile or not, subtended by [0]2 bractlets. Flower: bisexual, generally radial; hypanthium bell-shaped to cylindric, membranous or leathery, persistent in fruit; sepals appearing as hypanthium lobes, 4--9, epicalyx lobes alternate sepals or 0; petals, stamens inserted on inner hypanthium; petals 4--6 or 0, alternate sepals, crinkled, deciduous; stamens generally = or 2 × sepals, included or exserted; ovary generally superior, chambers 2--6[many], style generally slender, stigma head-like. Fruit: dry capsule or leathery berry, dehiscent into 2--4 valves or irregularly. Seed: 3--many.
Genera In Family: +- 28 genera, 600 species: temperate, tropics, generally in wet habitats. Some ornamental or cultivated for medicine, dyes. Note: "Epicalyx lobes" (lobes on calyx) formerly called "appendages," "hypanthium" in Lythraceae (and Onagraceae) including receptacle, sometimes called "flower cup" or "flower tube". Punicaceae (Punica) included here.
eFlora Treatment Author: Shirley A. Graham
Scientific Editor: Thomas J. Rosatti.
Genus: LythrumView DescriptionDichotomous Key

Common Name: LOOSESTRIFE
Habit: Annual, perennial herb. Stem: prostrate to erect, often 4-angled. Leaf: opposite, alternate, or whorled, linear to ovate or obovate, petiole 0 to short. Inflorescence: flowers generally 1--2 per axil, sessile or not. Flower: radial to +- bilateral, of 1--3 style forms (heterostylous); hypanthium cylindric or bell-shaped, ribs generally conspicuous; sepals 4--6, deltate, epicalyx lobes < to > sepals; petals 4--6 or 0; stamens 4--6 or 12, included or exserted; styles < to > stamens. Fruit: capsule, generally cylindric, rarely spheric, valves 2. Seed: many, < 1 mm.
Species In Genus: +- 35 species: temperate. Etymology: (Greek: clotted blood, from use of Lythrum salicaria, the first named sp., to stop hemorrhaging, according to Gerard, Bull Torrey Bot Club 12: 60. 1885)

Lythrum tribracteatum Spreng.
NATURALIZED
Habit: Annual, not heterostylous. Stem: 5--30 cm, glabrous to +- scabrous; branches often at base, decumbent to weakly ascending or erect. Leaf: 0.3--2.5 cm, lower opposite; upper alternate, oblong to oblanceolate. Inflorescence: flowers 1 per axil on main shoots and on short axillary shoots, +- sessile; +- glandular. Flower: hypanthium 5--6 mm, narrowly cylindric, 8--10 × longer than wide; sepals, epicalyx lobes +- 0.5 mm, thick; petals < 3 mm, lavender; stamens 4--6, included; style included. Fruit: cylindric, +- = hypanthium. Chromosomes: n=5.
Ecology: Wet areas, drying ponds; Elevation: < 1500 m. Bioregional Distribution: NCoRI, GV, CCo, SnFrB, n MP; Distribution Outside California: native to southern Europe. Flowering Time: May--Jun
eFlora Treatment Author: Shirley A. Graham
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Citation for this treatment: Shirley A. Graham 2016. Lythrum tribracteatum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=32409, accessed on February 11, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 11, 2016.


Lythrum tribracteatum
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© 2001 Tony Morosco

More photos of Lythrum tribracteatum in CalPhotos


Geographic subdivisions for Lythrum tribracteatum:
NCoRI, GV, CCo, SnFrB, n MP;
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.