Galactia P.Browne

First published in Civ. Nat. Hist. Jamaica: 298 (1756)
This genus is accepted
The native range of this genus is Tropics & Subtropics to Central U.S.A.

Descriptions

Leguminosae, J. B. Gillett, R. M. Polhill & B. Verdcourt. Flora of Tropical East Africa. 1971

Morphology General Habit
Herbs or subshrubs, prostrate, climbing or erect
Morphology Leaves
Leaves 1–7-foliolate, usually pinnately 3-foliolate; stipules small, usually deciduous; stipels present
Morphology Reproductive morphology Flowers
Flowers in axillary few-flowered often nodose false racemes or fascicles or lower ones sometimes solitary and rarely apetalous
Morphology Reproductive morphology Flowers Calyx
Calyx 4-fid because upper pair of teeth are completely joined
Morphology Reproductive morphology Flowers Corolla
Standard ovate or round, scarcely or not auriculate Corolla small
Morphology Reproductive morphology Flowers Androecium Stamens
Vexillary stamen free; anthers uniform (or ? sometimes reduced to 5)
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary subsessile; ovules numerous; style filiform, glabrous; stigma small, terminal
Morphology Reproductive morphology Fruits
Pod linear to linear-oblong, compressed, straight or curved, subseptate, more rarely 1-seeded geocarpous fruits are present
Morphology Reproductive morphology Seeds
Seeds small; hilum small, central, elliptic, not arillate or with a vestigial rim-aril.
[FTEA]

Leguminosae, B. Mackinder, R. Pasquet, R. Polhill & B. Verdcourt. Flora Zambesiaca 3:5. 2001

Morphology General Habit
Herbs or subshrubs, prostrate, climbing or erect.
Morphology Leaves
Leaves 1–7-foliolate, usually pinnately 3-foliolate; stipules small, usually deciduous; stipels present.
Morphology Reproductive morphology Flowers
Flowers in axillary few-flowered often nodose false racemes or fascicles or lower ones sometimes solitary and rarely apetalous.
Morphology Reproductive morphology Flowers Calyx
Calyx 4-fid because upper pair of teeth are completely joined.
Morphology Reproductive morphology Flowers Corolla
Corolla small; standard ovate or round, scarcely or not auriculate.
Morphology Reproductive morphology Flowers Androecium Stamens
Vexillary stamen free; anthers uniform (or ? sometimes reduced to 5).
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary subsessile; ovules numerous; style filiform, glabrous; stigma small, terminal.
Morphology Reproductive morphology Fruits
Pod linear to linear-oblong, compressed, straight or curved, subseptate, (more rarely 1-seeded geocarpous fruits are present).
Morphology Reproductive morphology Seeds
Seeds small; hilum small, central, elliptic, not arillate or with a vestigial rim aril.
[FZ]

George R. Proctor (2012). Flora of the Cayman Isands (Second Edition). Royal Botanic Gardens, Kew

Morphology General Habit
Slender herbaceous or woody vines, rarely erect shrubs; leaves pinnately 3-foliolate, with stipels; stipules small, often deciduous
Morphology Reproductive morphology Flowers
Flowers paired or clustered at raised nodes on axillary racemes, rarely solitary in the leaf-axils; bracteoles minute
Morphology Reproductive morphology Flowers Calyx
Calyx 4-lobed, the lobes acuminate, unequal; corolla pink or white; standard roundish, the margins slightly inflexed at the base; wings adherent to the keel and equalling it in length. Stamens 10, the lower 9 united, the uppermost free or partly so; anthers all alike
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary nearly sessile; style very slender, glabrous, with a minute stigma
Morphology Reproductive morphology Seeds
Pod elongate, straight or slightly curved, usually compressed, 2-valved, partly septate within.
Distribution
A pantropical genus of more than 80 species.
[Cayman]

Legumes of the World. Edited by G. Lewis, B. Schrire, B. MacKinder & M. Lock. Royal Botanic Gardens, Kew. (2005)

Habit
Subshrubs or perennial herbs
Ecology
Seasonally dry tropical and subtropical forest margins, thicket, woodland, wooded grassland, grassland and rocky shrubland
Distribution
c. 30 spp. in S America; c. 20-25 spp. in N & C America; Africa (2 spp.), tropical Asia to China and Japan (c. 6 spp.) and Australia (c. 2 spp.); 1-2 spp. pantropical
Note
Galactia forms a group in the Diocleinae together with Camptosema, Lackeya and Collaea (Queiroz et al., 2003), and Maxwell & Taylor (2003) include Rhodopis in their Galactia clade; three sections are recognised in Galactia: Odonia, Collaearia and Galactia.

Previous accounts of the Phaseoleae by Baudet (1978) and Lackey (1981) recognised 90 and 84 genera and c. 1540 and 1480 species respectively in the tribe. In an equivalent, i.e. traditionally held view of Phaseoleae, 89 genera and (1554)–1567–(1580) species are treated here (Table 9; Fig. 47). Changes between Baudet (1978) and this treatment are that eleven genera are now in synonymy or have subsequently been placed in Millettieae, two genera have been transferred from Desmodieae and eight new genera have been added. Vigna has traditionally been thought to comprise some 150–200 species, but Vigna sens. strict. may contain fewer than 100.

Recent molecular analyses of the tribe, however, have emphasised both the polyphyletic and paraphyletic nature of Phaseoleae as traditionally circumscribed (Bruneau & Doyle, 1990; Doyle & Doyle, 1993; Delgado Salinas et al., 1993; Bruneau et al., 1995; Doyle et al., 1997, 2000; Kajita et al., 2001; Goel et al., 2001; Lee & Hymowitz, 2001). This has required a radical realignment of elements of the phaseoloids (Table 9; Fig. 47), with at least two major clades being evident: Phaseoleae subtribes Diocleinae and Ophrestiinae which together with tribe Abreae are allied to the core-Millettieae (Fig. 45), and the remaining groups comprising a Phaseoleae sens. lat. clade. The rbcL phylogeny of Kajita et al. (2001) and the ITS analysis of Hu et al. (2002) are equivocal as to which clade subtribe Clitoriinae belongs. Phaseoleae sens. lat. also includes two traditionally independent tribes, the Desmodieae and Psoraleeae. Delimiting a recircumscribed Phaseoleae sens. strict is thus very problematic. A solution may be to recognise a broad tribe Phaseoleae, comprising the subtribes Kennediinae, Cajaninae, Phaseolinae and Glycininae, assorted basally branching genera, and tribes Desmodieae and Psoraleeae (both treated at subtribal level).

[LOWO]

Uses

Use
Used as wildlife forage (milkpeas often host butterflies)
[LOWO]

Sources

  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of the Cayman Islands

    • Flora of the Cayman Islands
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Science Photographs

    • Copyright applied to individual images
  • Legumes of the World Online

    • http://creativecommons.org/licenses/by-nc-sa/3.0