Herbs, subshrubs, or shrubs. Stems mostly fleshy. Leaves alternate, opposite, or verticillate, usually simple; stipules absent; leaf blade entire or slightly incised, rarely lobed or imparipinnate. Inflorescences terminal or axillary, cymose, corymbiform, spiculate, racemose, paniculate, or sometimes reduced to a solitary flower. Flowers usually bisexual, sometimes unisexual in Rhodiola (when plants dioecious or rarely gynodioecious), actinomorphic, (3 or) 4-6(-30) -merous. Sepals almost free or basally connate, persistent. Petals free or connate. Stamens as many as petals in 1 series or 2 × as many in 2 series. Nectar scales at or near base of carpels. Follicles sometimes fewer than sepals, free or basally connate, erect or spreading, membranous or leathery, 1- to many seeded. Seeds small; endosperm scanty or not developed.
About 35 genera and over 1500 species: Africa, America, Asia, Europe; 13 genera (two endemic, one introduced) and 233 species (129 endemic, one introduced) in China.
Some species of Crassulaceae are cultivated as ornamentals and/or used medicinally.[1]
When placed before a specific epithet, indicates the taxon is of known hybrid origin. The basic number of chromosomes in a polyploid series.
There are approximately 328 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them: x. Ackersteinia dodsonii · x. Aeonichryson aizoides · x. Aeoniogreenovia lambii · x. Aglaonaria robertsii · x. Agroelymus adamsii · x. Agroelymus bergrothii · x. Agroelymus bowdenii · x. Agroelymus cayouetteorum · x. Agroelymus colvillensis · x. Agroelymus dorei · x. Agroelymus hirtiflorus · x. Agroelymus hodgsonii · x. Agroelymus hultenii · x. Agroelymus jamesensis · x. Agroelymus mossii · x. Agroelymus ontariensis · x. Agroelymus palmerensis · x. Agroelymus pamiricus · x. Agroelymus piettei · x. Agroelymus strictus · x. Agroelymus turneri · x. Agroelymus ungavensis · x. Alcalthaea suffrutescens · x. aleuticus (Aleutian Wildrye) · x. Alismodorus muretii · x. Amarcrinum memoria-corsii (Amarcrinum) · x. Amarine tubergenii · x. Amarygia bidwellii · x. Amarygia parkeri · x. Anacamptorchis duquesnei · x. Anacamptorchis durandii · x. Anacamptorchis fallax. · x. Anacamptorchis guetroti · x. Anacamptorchis kelleri · x. Anacamptorchis klingei · x. Anacamptorchis la-niccae · x. Anacamptorchis laniccae · x. Anacamptorchis laniccae nothosubsp. galloprovinciana · x. Anacamptorchis larzacensis · x. Anacamptorchis lesbiensis · x. Anacamptorchis simorrensis · x. Anacamptorchis simorrensis nothovar. ticinensis · x. Anacamptorchis ticinensis · x. Anacamptorchis vanlookenii · x. Anacamptorchis weberi · x. Anoectomaria dominii · x. Aporberocereus innesii · x. arcuatum (Arcuate Barley) · x. aristatus (Purple Wildrye) · x. Asplenicystopteris blindii · x. Asplenicystopteris payotii · x. Asplenoceterach badense · x. Asplenoceterach barrancense · x. Asplenoceterach newmanii · x. Asplenophyllitis claphamii · x. Asplenophyllitis confluens · x. Asplenophyllitis hendersonii · x. Asplenophyllitis jacksonii · x. Asplenophyllitis kummerlei · x. Asplenophyllitis lobata · x. Asplenophyllitis microdon · x. Asplenosorus akaishiensis · x. Asplenosorus boydstoniae · x. Asplenosorus castaneoviridis · x. Asplenosorus ebenoides · x. Asplenosorus gravesii · x. Asplenosorus herb-wagneri · x. Asplenosorus inex.pectatus · x. Asplenosorus kentuckiensis · x. Asplenosorus kitazawae · x. Asplenosorus pinnatifidus · x. Asplenosorus shawneensis · x. Asplenosorus tosaensis · x. Asplenosorus trudellii · x. Astroworthia bicarinata · x. Astroworthia bicarinata nm. skinneri · x. Astroworthia skinneri · x. Attabignya minarum · x. Bolboschoenoplectus mariqueter · x. Bonstedtia lilacina · x. Bonstedtia youngiana · x. Borkersia soniae · x. Brachystemon nolae-carriae · x. braunii (Braun's Festulolium) · x. Brunsdonna parkeri · x. Brunserine tubergenii · x. Butyagrus nabonnandii · x. caduca (Mandan Ricegrass) · x. Calicharis butcheri · x. Carapelia tarantuloides · x. carduus font-queri · x. Carruanthophyllum hybridum · x. carthamus battandieri · x. carthamus doumerguei · x. carthamus faurei · x. centaurea bourlieri · x. centaurea impura · x. centaurea serresii · x. Ceterophyllitis hybrida · x. Chamaebivia francescae
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