Crassula L.

First published in Sp. Pl.: 283 (1753)
This genus is accepted
The native range of this genus is Cosmopolitan.

Descriptions

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Annual or perennial herbs, rarely shrubs
Morphology Leaves
Leaves opposite, free or united at the base to form a sheath around the stem, entire
Morphology Reproductive morphology Flowers
Flowers in terminal cymes or in 1–few-flowered axillary clusters, (3–)4–5(–8)-merous
Morphology Reproductive morphology Flowers Calyx
Sepals free or slightly united
Morphology Reproductive morphology Flowers Corolla
Petals usually slightly united at the base, white or reddish
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens as many as petals
Morphology Reproductive morphology Flowers Nectaries
Nectary scales usually very small
Morphology Reproductive morphology Fruits
Follicles with 1–many seeds.
Distribution
About 200 species, the majority in South Africa, some also in Arabia, Madagascar, Europe, America and Australia.
[FSOM]

Crassulaceae, G.E. Wickens. Flora of Tropical East Africa. 1987

Morphology General Habit
Annual or perennial herbs, rarely shrubs, frequently fleshy
Morphology Leaves
Leaves very rarely absent, decussate, free or ± connate at the base to form a sheath around the stem, usually sessile, almost always entire, flattish, semiterete or subterete, glabrous, pubescent papillose or scabrid, margin smooth, ciliate or papillate
Morphology Reproductive morphology Inflorescences
Inflorescence usually corymbose, subumbellate, capitate or thyrsoid, sometimes an axillary fascicle or flowers rarely solitary
Morphology Reproductive morphology Flowers
Flowers isomerous, 3–4- or 5-merous, rarely 6- or 9-merous
Morphology Reproductive morphology Flowers Calyx
Calyx usually much shorter than the corolla Sepals free or slightly united at the base
Morphology Reproductive morphology Flowers Corolla
Petals usually slightly united at the base, white or red, rarely yellow or bluish; lobes stellate, erect, patent or connivent, apex often dorsally mucronate, the mucro small, hemispherical or cylindrical, usually blunt or conspicuous, ovoid or subglobular
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens equal in number to the petals, episepalous, or in gamopetalous corollas affixed to the tube; filaments often subulate, sometimes flattened; anthers ovate or oblong, sometimes with conspicuous connective
Morphology Reproductive morphology Flowers Nectaries
Nectary scales usually very small, narrowly to broadly spathulate to obcuneate or square, rounded and slightly emarginate at the apex, rarely stipitate
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels free or slightly united at the base; ovules numerous, rarely 1–2; styles often subulate, narrowly cylindrical or filamentous, often as long as the ovaries, or short and relatively thick; stigmata small, terminal or more rarely subdorsal.
[FTEA]

Crassulaceae, R. Fernandes. Flora Zambesiaca 7:1. 1983

Morphology General Habit
Annual or perennial succulent herbs, sometimes with a tuber-like root, or undershrubs or shrubs with ± woody root-stock and succulent usually ± fleshy leaves.
Morphology Leaves
Leaves opposite, usually decussate, the lowermost frequently rosulate, free or ± connate in a sheath, usually simple, undivided and entire, thin to ± thick, flat, terete, semiterete, ovoid, etc.
Morphology Reproductive morphology Flowers
Flowers (3-4)5(6-9)-merous, isomerous, usually small and not showy, in cymes arranged either in dense subsessile or pedunculate axillary clusters sometimes forming thyrsoid inflorescences, or in corymb-like axillary or terminal loose or ± dense inflorescences, sometimes 1(2) flowers in the leaf-axils.
Morphology Reproductive morphology Flowers Calyx
Calyx usually shorter than the corolla, with the sepals free or slightly connate at the base, appressed to the corolla, ± succulent.
Morphology Reproductive morphology Flowers Corolla
Corolla usually white or whitish turning orange or brownish-red when dry, sometimes red or carmine, rarely bright yellow, persistent; petals erect or stellate, connate at the base into a ± short tube.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens free or with the lower part of the filaments connate with the corolla-tube, alternipetalous; anthers ovate or oblong, sometimes nearly circular.
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels free or connate at the base, oblong or obovoid, attenuate towards or contracted into a ± short usually terminal style, sometimes the styles nearly absent and stigmas subdorsal, completely glabrous or papillose along the suture; ovules numerous or sometimes 1-4.
Morphology Reproductive morphology Flowers Nectaries
Scales shorter than the carpels, hyaline or reddish-brown or rose, thin, narrowly to broadly spathulate or obovate or cuneate.
[FZ]

Ghazanfar, S. A. & Edmondson, J. R (Eds). (2014) Flora of Iraq, Volume 5 Part 2: Lythraceae to Campanulaceae.

Morphology General Habit
Minute annual herbs to succulent perennial subshrubs with fibrous roots
Morphology Stem
Stems erect or ascending
Morphology Leaves
Leaves opposite, sessile, connate at base to form a sheath
Morphology Reproductive morphology Inflorescences
Inflorescence axillary or terminal, cymose
Morphology Reproductive morphology Flowers
Flowers (2–)4(–5)-merous
Morphology Reproductive morphology Flowers Calyx
Sepals free
Morphology Reproductive morphology Flowers Corolla
Petals free
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens equal in number to petals
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels free; style short; stigma minute
Morphology Reproductive morphology Seeds
Follicles 1–many-seeded.
Distribution
A genus of about 20 species, worldwide, except Antarctica. One species in Iraq.
[FIQ]

Sources

  • Flora Zambesiaca

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

    • Ghazanfar, S. A., Edmondson, J. R. (Eds). (2013-2019). Flora of Iraq, Volumes 5.1, 5.2 and 6.0. Kew Publishing
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of Somalia

    • Flora of Somalia
    • 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
  • 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