Common Names in English:
Marsh Primrose-Willow, Marsh Purslane, Marsh Seedbox, Marsh Seedbox Ludwigia Palustris, Marsh-Purslane, Water Primrose, Water Purslane, Water-Purslane
herbs, or shrubs
, rarely trees
to 30 m
tall, often with epidermal oil cells
, usually with internal phloem
. Leaves simple
, spirally arranged
, opposite, or occasionally whorled
, entire or toothed
; stipules present and usually caducous
, or absent. Flowers perfect
or occasionally unisexual
or zygomorphic, (2-) 4(-7) -merous, axillary
, in leafy spikes or racemes
or solitary, or occasionally in panicles, all but Ludwigia with distinct
within. Sepals green or colored
. Petals as many as sepals or rarely absent, variously colored, imbricate or convolute and occasionally clawed. Stamens as many as sepals in one series or 2 Ã— as many as sepals in 2 series [in Lopezia Cavanilles reduced to 2 or 1 plus 1 sterile
versatile or basifixed
, sometimes cross-partitioned, opening by longitudinal
slits; pollen grains
almost always united
by viscin threads, shed as monads
, or polyads
. Ovary inferior, with as many carpels and locules as sepals, septa sometimes thin or absent at maturity; placentation axile
, ovules 1 to many per locule, in 1 or several rows
or clustered, anatropous
, bitegmic; style 1; stigma with as many lobes
as sepals or clavate
. Fruit a loculicidal capsule or indehiscent nut or berry. Seeds small, smooth
or variously sculptured
, sometimes with a coma [or wing
], with straight oily embryo, endosperm lacking.
Seventeen genera and ca. 650 species: widespread in temperate and subtropical areas, but best represented in W North America; six genera (two introduced ), 64 species (11 endemic, 11 introduced), and five natural hybrids (two endemic) in China.
Onagraceae are a well-defined, monophyletic family in the order Myrtales, with a sister relationship to Lythraceae. Within the order Myrtales, the Onagraceae are distinguished by a number of features including (1) a distinctive 4-nucleate embryo sac; (2) abundant raphides in vegetative cells ; (3) paracrystalline beaded pollen ektexine; and (4) pollen with viscin threads.
Some species of Oenothera are grown for the oil in their seeds, which contains gamma linolenic acid (GLA), used for medicinal purposes. Several species of Onagraceae also are cultivated in China for their horticultural value, including species of Fuchsia Linnaeus (generally distinguished by having large, tubular , red or orange flowers and fleshy berries ) and Clarkia Pursh (distinguished by having stigmas with commissural lobes with dry, unicellular papillae, and dry, elongate capsules similar to those of Epilobium but lacking comas on the seeds) . The most commonly cultivated Fuchsia is F. Ã—hybrida Hort. and the related F. magellanica Lamarck in F. sect. Quelusia (Vandelli) Candolle from South America; F. triphylla Linnaeus, in F. sect. Fuchsia, from Hispaniola, is known from only one gathering in Fujian. Similarly, Clarkia amoena (Lehmann) A. Nelson & J. F. Macbride is widely cultivated in China, whereas C. pulchella Pursh is known from only one gathering in Xizang; both species are native to W North America. There are no naturalized species of either Clarkia or Fuchsia in China.
Herbs slender, erect
at nodes, or shrubs
or rarely small trees
; underwater parts often swollen and spongy
or with inflated
white spongy pneumatophores. Leaves alternate [or opposite], usually entire; stipules present, reduced and/or deciduous; bracteoles 2, at or near base
of ovary, or absent. Flowers perfect
, in upper leaf axils
or in spikes, racemes
, or clusters
; floral tube
not prolonged beyond ovary. Sepals (3 or) 4 or 5(-7), green, persistent
. Petals as many as sepals or absent, yellow or white, caducous
. Stamens as many as or 2 Ã— as many as sepals; anthers
versatile or sometimes basifixed
; pollen shed singly or in tetrads
. Ovary with as many locules as sepals, rarely more, apex flat or conic, often with a depressed
surrounding base of each epipetalous
stamen; stigma capitate or hemispheric
, entire or lobed
, upper 1/2-2/3 receptive. Fruit an obovoid
irregularly or by a terminal
or by flaps separating from valvelike apex. Seeds numerous
, in one to several rows
per locule, free
in powdery or woody endocarp, raphe small or conspicuous
, sometimes equal in size to body of seed. 2n = 16, 32, 48, 64, 80, 96, 128.
Eighty-two species: cosmopolitan , on all continents except Antarctica; nine species (one endemic) in China.
Ludwigia is distinctive within the family , and morphological, anatomical, and molecular evidence indicates that it is the sister group to the remainder of the family. Historically, plants of this affinity with stamen number equal to sepal number were Ludwigia, and those with stamens twice as many as sepals were Jussiaea, but Raven and others demonstrated reticulate variation in this character, and treated the two groups as a single genus. Polyploidy and autogamy are important evolutionary phenomena within the genus.
Flowers: Bloom Period: June. • Flower Color: chartreuseyellow-green
Size: under 6" tall.
Typically found at an altitude of 0 to 3,037 meters (0 to 9,964 feet).
Sunlight: Sun Exposure: Full Sun .
Temperature: Cold Hardiness: 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b, 11. (map)
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Kenrick & Crane, 1997
- Brongniart, 1843
- Takhtajan, 1967
- Takhtajan, 1967
- Order: Myrtales () - Reichenbach, 1828
- Superorder: Myrtanae () - Takhtajan, 1967
- Subclass: Rosidae () - Takhtajan, 1967
- Class: Spermatopsida () - Brongniart, 1843
- 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
Isnardia palustris L. • Ludwigia palustris var. americana (Dc.) Fern. & Grisc. • Ludwigia palustris var. nana Fern. & Grisc. • Ludwigia palustris var. pacifica Fern. & Grisc.
Status: Accepted Name
Last scrutiny: 15-Mar-2000
Members of the genus Ludwigia
ZipcodeZoo has pages for 51 species, subspecies, varieties, forms, and cultivars in this genus:
L. alata (Winged Primrose Willow) · L. alternifolia (Bushy Seedbox) · L. arcuata (Piedmont Primrose-Willow) · L. bonariensis (Carolina Primrose-Willow) · L. brevipes (Long Beach Primrose-Willow) · L. curtissii (Curtiss' Primrose-Willow) · L. decurrens (Primrose Willow) · L. erecta (Yerba De Jicotea) · L. glandulosa (Creeping Seedbox) · L. glandulosa brachycarpa (Creeping Seedbox) · L. glandulosa glandulosa (Creeping Seedbox) · L. glandulosa subsp. brachycarpa (Cylindricfruit Primrose-Willow) · L. hirtella (Hairy Ludwigia) · L. hyssopifolia (Seed Box) · L. hyssopifolia apud (Seedbox) · L. lacustris (Lake Ludwigia) · L. lanceolata (Lance-Leaf Seedbox) · L. leptocarpa (Angle-Stemmed Primrose-Willow) · L. linearis (Narrow-Leaf Seedbox) · L. linifolia (Southeastern Primrose-Willow) · L. longifolia (Longleaf Primrose-Willow) · L. maritima (Seaside Primrose-Willow) · L. microcarpa (Small-Fruit Seedbox) · L. nervosa (Water Primrose) · L. octovalvis (Mexican Primrose Willow) · L. octovalvis octovalvis (Mexican Primrosewillow) · L. octovalvis sessiliflora (Mexican Primrose-Willow) · L. octovalvis subsp. octovalvis (Mexican Primrose-Willow) · L. octovalvis subsp. sessiliflora (Mexican Primrose-Willow) · L. palustris (Marsh Primrose-Willow) · L. palustris var. typica (Marsh Primrose-Willow) · L. peploides (Clove-Strip) · L. peploides glabrescens (Floating Primrosewillow) · L. peploides montevidensis (Floating Primrose-Willow) · L. peploides peploides (Floating Primrosewillow) · L. peploides subsp. glabrescens (Floating Primrose-Willow) · L. peploides subsp. montevidensis (Floating Primrose-Willow) · L. peruviana (Peruvian Primrose-Willow) · L. pilosa (Hairy Primrose-Willow) · L. polycarpa (Many-Fruit False-Loosestrife) · L. ravenii (Raven's Primrose-Willow) · L. repens (Creeping Primrose Willow) · L. sedioides (Mosaic Plant) · L. sedoides (False Loosestrife) · L. simpsonii (Simpson's Primrose-Willow) · L. spathulata (Spathulate Seedbox) · L. sphaerocarpa (Globe-Fruited False-Loosestrife) · L. suffruticosa (Shrubby Primrose-Willow) · L. uruguayensis (Large-Flower Primrose-Willow) · L. virgata (Savanna Seedbox) · L. x lacustris (Lake Ludwigia)
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- Globally Unique Identifier: urn:lsid:ipni.org:names:104857-3
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- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 27336
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- Mean = 186.740 meters (612.664 feet), Standard Deviation = 267.750 based on 12,538 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]