Fleshy perennials, shrubs, trees or vines, terrestrial or epiphytic. Stems jointed, terete, globose, flattened, or fluted, mostly leafless and variously spiny. Leaves alternate, flat or subulate to terete, vestigial, or entirely absent; spines, glochids (easily detached, small, bristlelike spines), and flowers always arising from cushionlike, axillary areoles (modified short shoots) . Flowers solitary, sessile, rarely clustered and stalked (in Pereskia), bisexual, rarely unisexual, actinomorphic or occasionally zygomorphic. Receptacle tube (hypanthium or perianth tube) absent or short to elongate, naked or invested with leaflike bracts, scales, areoles, and hairs, bristles, or spines; perianth segments usually numerous, in a sepaloid to petaloid series. Stamens numerous, variously inserted in throat and tube; anthers 2-loculed, dehiscing longitudinally. Ovary (pericarpel) inferior, rarely superior, 1-loculed, with 3 to many parietal (rarely basal) placentas; ovules usually numerous; style 1; stigmas 2 to numerous, papillate, rarely 2-fid. Fruit juicy or dry, naked, scaly, hairy, bristly, or spiny, indehiscent or dehiscent, when juicy then pulp derived from often deliquescent funicles (except in Pereskia) . Seeds usually numerous, often arillate or strophiolate; embryo curved or rarely straight; endosperm present or absent; cotyledons reduced or vestigial, rarely leaflike.
About 110 genera and more than 1000 species: temperate and tropical America; Rhipsalis baccifera (J. S. Mueller) Stearn native in tropical Africa, Madagascar, Comoros, Mascarenes, and Sri Lanka; some species of other genera now extensively naturalized in the Old World through human agency; more than 60 genera and 600 species cultivated as ornamentals or hedges in China, of which four genera and seven species more or less naturalized.[1]
Culture: Space 18-24" apart.
Sunlight: Sun Exposure: Full Sun.
Moisture: Drought Tolerance: High
Temperature: Cold Hardiness: 10b, 11. (map)
There are approximately 203 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them: H. acranthus deflexispinus · H. acranthus zonatus · H. decumbens tenuis · H. pacalaensis repens · H. pseudomelanostele chryseus · H. acanthocladus · H. achaetus · H. acranthus (Haageocereus) · H. acranthus acranthus · H. acranthus f. clavispinus · H. acranthus f. repandus · H. acranthus f. rubriflorior · H. acranthus subsp. backebergii · H. acranthus subsp. deflexispinus · H. acranthus subsp. olowinskianus · H. acranthus subsp. zonatus · H. acranthus var. crassispinus (Haageocereus) · H. acranthus var. fortalezensis · H. acranthus var. metachrous · H. acranthus var. olowinskianus · H. acranthus var. piscoensis (Haageocereus) · H. akersii · H. albisetatus · H. albispinus (Haageocereus) · H. albispinus var. albiflorus (Haageocereus) · H. albispinus var. floribundus (Haageocereus) · H. albispinus var. roseospinus · H. albus · H. ambiguus · H. ambiguus var. reductus · H. aureispinus · H. aureispinus var. fuscispinus · H. aureispinus var. rigidispinus · H. auricolor · H. australis (Quisco De La Costa De Arica) · H. australis f. cristata (Haageocereus) · H. australis f. nanus · H. australis f. subtilispinus (Haageocereus) · H. australis nanus · H. australis subtilispinus · H. australis var. acinacispinus (Haageocereus) · H. cephalomacrostibas · H. chalaensis (Haageocereus) · H. chilensis · H. chosicensis · H. chosicensis f. rubrospinus · H. chosicensis var. albispinus · H. chosicensis var. rubrospinus · H. chrysacanthus · H. chryseus (Haageocereus) · H. churinensis · H. clavatus · H. clavispinus · H. climaxanthus · H. comosus · H. convergens · H. crassiareolatus · H. crassiareolatus Rauh & Backeb. var. smaragdisepalus Rauh & Backeb. · H. crassiareolatus var. smaragdisepalus · H. cuzcoensis · H. cuzcoensis var. tenuarboreus · H. decumbens (Haageocereus) · H. decumbens f. spinosior · H. decumbens subsp. tenuis · H. decumbens var. brevispinus · H. decumbens var. multicolorispinus (Haageocereus) · H. decumbens var. spinosior (Haageocereus) · H. deflexispinus · H. dichromus · H. dichromus Rauh & Backeb. var. pallidior Rauh & Backeb. · H. dichromus var. pallidior · H. divaricatispinus · H. elegans · H. fascicularis (Quisco De La Precordillera De Arica) · H. fasciculatus · H. faustianus · H. fulvus · H. fulvus var. yautanensis · H. hamatacanthus · H. horrens · H. horrens var. sphaerocarpus · H. humifusus · H. icensis (Haageocereus) · H. icosagonoides (Haageocereus) · H. icosagonoides f. heteracanthus · H. icosagonoides heteracanthus · H. johnsonii · H. lachayensis · H. lanugispinus (Haageocereus) · H. lanugispinus 'Densiaculeatus' (Haageocereus) · H. laredensis · H. laredensis var. longispinus · H. limensis · H. limensis var. brevispinus · H. limensis var. deflexispinus · H. limensis var. zonatus · H. litoralis · H. longiareolatus · H. longicomus · H. mamillatus
There are approximately 831 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them: G. anisitsii damsii · G. anisitsii volkeri · G. castellanosii acorrugatum · G. castellanosii ferocior · G. damsii evae · G. denudatum angelae · G. denudatum angulatum · G. fischeri suyuquense · G. gibbosum borthii · G. gibbosum radekii · G. glaucum ferrarii · G. hyptiacanthum schroederianum · G. megalothelon prestleanum · G. mostii ferocior · G. ritterianum acentracanthum · G. saglione tilcarense · G. schickendantzii bergeri · G. spegazzinii armatum · G. spegazzinii bayrianum · G. valnicekianum prochazkianum · G. zegarrae millaresii · G. zegarrae riograndense · G. achirasense · G. acorrugatum · G. albiareolatum (Gymnocalycium) · G. albiareolatum var. castaneum (Gymnocalycium) · G. albiareolatum var. ramosum (Gymnocalycium) · G. albispinum · G. alboareolatum · G. alboareolatum var. ramosum · G. altagraciense (Gymnocalycium) · G. ambatoense (Gymnocalycium) · G. ambatoense subsp. plesnikii · G. amerhauseri (Gymnocalycium) · G. amoenum · G. andreae (Gymnocalycium) · G. andreae andreae · G. andreae carolinense (Gymnocalycium) · G. andreae f. svecianum · G. andreae matznetteri (Gymnocalycium) · G. andreae subsp. carolinense · G. andreae subsp. matznetteri · G. andreae var. doppianum (Gymnocalycium) · G. andreae var. fechseri (Gymnocalycium) · G. andreae var. fechserianum (Gymnocalycium) · G. andreae var. grandiflorum (Gymnocalycium) · G. andreae var. leucanthum (Gymnocalycium) · G. andreae var. longispinum (Gymnocalycium) · G. andreae var. rosae (Gymnocalycium) · G. andreae var. svecianum · G. andreae var. svezianum (Gymnocalycium) · G. angelae (Gymnocalycium) · G. anisitii · G. anisitsii (Gymnocalycium) · G. anisitsii anisitsii · G. anisitsii holdii (Gymnocalycium) · G. anisitsii multiproliferum (Gymnocalycium) · G. anisitsii subsp. damsii · G. anisitsii subsp. holdii · G. anisitsii subsp. multiproliferum · G. anisitsii subsp. volkeri · G. anisitsii var. griseopallidum · G. anisitsii var. griseopallium (Gymnocalycium) · G. anisitsii var. pseudomalacocarpus (Gymnocalycium) · G. anisitsii var. spinosa (Gymnocalycium) · G. anisitsii var. tucavocense · G. anisitsii var. variegata (Gymnocalycium) · G. antherostele · G. armatum · G. artigas · G. asterium · G. asterium A.Cast. var. paucispinum Backeb. · G. asterium var. minimum · G. asterium var. paucispinum · G. baldianum (Dwarf Chin Cactus) · G. baldianum (Speg.) Speg. var. venturianum · G. baldianum f. cristata (Gymnocalycium) · G. baldianum var. albiflorum (Gymnocalycium) · G. baldianum var. pazoutianum (Gymnocalycium) · G. baldianum var. sanguiniflorum (Gymnocalycium) · G. baldianum var. venturianum (Gymnocalycium) · G. baldianum var. venturii (Gymnocalycium) · G. bayrianum (Gymnocalycium) · G. bayrianum var. brevispinum (Gymnocalycium) · G. bayrianum var. longispinum (Gymnocalycium) · G. berchtii (Gymnocalycium) · G. bicolor · G. bicolorispina · G. bodenbenderianum (Gymnocalycium) · G. bodenbenderianum bodenbenderianum · G. bodenbenderianum f. caespitosum (Gymnocalycium) · G. bodenbenderianum intertextum · G. bodenbenderianum subsp. intertextum · G. bodenbenderianum var. intermedium (Gymnocalycium) · G. bodenbenderianum var. mirandaense (Gymnocalycium) · G. bodenbenderianum var. moserianum (Gymnocalycium) · G. bodenbenderianum var. pipanacoense (Gymnocalycium) · G. bodenbenderianum var. rubrovariegata (Gymnocalycium) · G. bodenbenderianum var. variegata (Gymnocalycium) · G. bodenbenderianus
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