Crassula

Crassula multicava

The Crassula ( Crassula ) is the only genus in the subfamily Crassuloideae of the family Crassulaceae ( Crassulaceae ). The botanical name of the genus is derived from the Latin adjective for crassus, thick ' and refers to the majority of succulent leaves. Its distribution focus is the Cape flora in southern Africa. It is next to the genus Sedum, the most species-rich genus within the family of the Crassulaceae ( Crassulaceae ).

• 4.1 Literature
• 4.2 Notes and references

Description

Vegetative characteristics

The species of the genus Crassula are annual or perennial herbaceous plants, or dwarf to treelike shrubs with growth heights of up to 2.5 meters. They rarely grow as tubers geophytes. Their roots are fibrous and fleshy. The shoots are succulent, sometimes they become woody. The decussate arranged leaves are thickish fleshy to membranous. The leaves of a pair are fused at their base something together. You can be stalked persistent or deciduous, sessile or short. The leaves are entire, and scheidig at their base. Your leaf blade may be bald, hairy or warty. Occasionally, they have a clearly visible water column.

Generative features

The inflorescence is a thyrsus with numerous individual to you Asia. Partial inflorescences are sometimes heaped on balls of. Rarely come to individual flowers before reduced inflorescences. The bracts are often leaf-like. A peduncle may be present or it is not clearly marked. The bracts are then shorter or as long as the leaves.

The four-to five-fold (rarely two to zwölfzähligen ), usually small flowers are haplostemon. The four - to five (rarely two to twelve) sepals are fused at their base with each other briefly. The four - to five (rarely two to twelve) petals are also fused at their base with each other briefly. Often located appendage to their tips. The stamens are fused at their base with the petals and are alternately with them. The anthers may protrude from the flower. You do not have terminated appendage. The Nektarschüppchen are flat to plump, the carpels are free or slightly depressed in the floral axis and taper gradually to a short or long style with individual scars.

The ellipsoidal seeds are smooth or warty, the warts are sometimes arranged in longitudinal rows.

Dissemination

The genus is almost exclusively used in Africa. Their greatest biodiversity it has in the Cape flora, where about 150 species are native. Few species are used as marsh and aquatic plants all over the world. The only two native species in Germany Crassula Crassula aquatica Tillaea and are there now to be extinct.

System

The genus Crassula is the only genus in the subfamily Crassuloideae within the family Crassulaceae ( Crassulaceae ). The first description was in 1753 in Species Plantarum by Carolus Linnaeus. As type plant of the genus Crassula perfoliata L. was determined.

Synonyms of the genus include Bulliarda DC., Combesia A.Rich. , Danielia Lem. , Dinacria Haw. , Globulea Haw. , Gomara Adans. , Grams Anthes DC., Larochea pers., Rhopalota NEBr. , Rochea DC., Sphaeritis Eckl. & Zeyh. , Tillaeastrum Britton and Vauanthes Haw.

After Ernst Jacobus van Jaarsveld ( born 1953 ), the genus Crassula divided into two subgenera with 20 sections and the following types:

Crassula subg. Disporocarpa fish. & C.A.Mey.

• Section Helophytum ( Eckl. & Zeyh. ) Toelken Crassula aphylla
• Crassula aquatica (Water Crassula )
• Crassula drummondii
• Crassula elatinoides
• Crassula gemmifera
• Crassula granvikii
• Crassula hedbergii
• Crassula helmsii
• Crassula Hunua
• Crassula inanis
• Crassula kirkii
• Crassula longipes
• Crassula manaia
• Crassula mataikona
• Crassula minutissima
• Crassula moschata
• Crassula multicaulis
• Crassula natans Crassula natans var minus
• Crassula natans var natans

• Section Glomeratae Haw. Crassula alata Crassula alata subsp. alata
• Crassula alata subsp. pharnaceoides

• Crassula colorata var acuminata
• Crassula colorata var colorata
• Crassula colorata var miriamiae

• Crassula decumbens var brachyphylla
• Crassula decumbens var decumbens

• Crassula lanceolata subsp. denticulata
• Crassula lanceolata subsp. lanceolata
• Crassula lanceolata subsp. transvaalensis

• Crassula muscosa var muscosa
• Crassula muscosa obtusifolia var
• Crassula muscosa parvula var
• Crassula muscosa var polpodacea

• Crassula schimperi subsp. phyturus
• Crassula schimperi subsp. schimperi

• Crassula sieberiana subsp. rubinea
• Crassula sieberiana subsp. sieberiana
• Crassula sieberiana subsp. tetramera

• Crassula thunbergiana subsp. minutiflora
• Crassula thunbergiana subsp. thunbergiana

• Section Dinacria ( Harv. ) Schönland Crassula depressa
• Crassula dichotoma
• Crassula filiformis
• Crassula grammanthoides
• Crassula sebaeoides

• Section Filipedes ( Harv. ) Schönland Crassula expansa Crassula expansa subsp. expansa
• Crassula expansa subsp. filicaulis
• Crassula expansa subsp. fragilis
• Crassula expansa subsp. pyrifolia

• Crassula Volkensii subsp. coleae
• Crassula Volkensii subsp. Volkensii

• Section Deltoideae DC. Crassula corallina Crassula corallina subsp. corallina
• Crassula corallina subsp. macrorrhiza

• Section Anacampseroideae Haw. Crassula alticola
• Crassula arborescens Crassula arborescens subsp. arborescens
• Crassula arborescens subsp. undulatifolia

• Crassula multicava subsp. floribunda
• Crassula multicava subsp. multicava

• Crassula pellucida subsp. alsinoides
• Crassula pellucida subsp. brachypetala
• Crassula pellucida subsp. marginalis
• Crassula pellucida subsp. pellucida
• Crassula pellucida subsp. spongiosa

• Crassula sarmentosa var integrifolia
• Crassula sarmentosa var sarmentosa

• Section Petrogeton ( Eckl. & Zeyh. ) Walp. Crassula alcicornis
• Crassula capensis Crassula capensis var albertiniae
• Crassula capensis capensis var
• Crassula capensis var promontorii

• Section Galpiniflorae Toelken Crassula peploides

• Section Acutifoliae ( Schönland ) Toelken Crassula biplanata
• Crassula dependens
• Crassula ericoides Crassula ericoides subsp. ericoides
• Crassula ericoides subsp. torulosa

• Crassula sarcocaulis subsp. rupicola
• Crassula sarcocaulis subsp. sarcocaulis

• Crassula tetragona subsp. acutifolia
• Crassula tetragona subsp. connivens
• Crassula tetragona subsp. lignescens
• Crassula tetragona subsp. robusta
• Crassula tetragona subsp. rudis
• Crassula tetragona subsp. tetragona

Crassula subg. Crassula

• Section Squamulosae Haw. Crassula muricata
• Crassula pallens
• Crassula pruinosa
• Crassula pustulata
• Crassula rudolfii
• Crassula scabra
• Crassula whiteheadii

• Section Subulares Haw. ex DC. Crassula ciliata
• Crassula cymosa
• Crassula lasiantha
• Crassula multiflora Crassula multiflora subsp. leucantha
• Crassula multiflora subsp. multiflora

• Crassula subulata var fastigiata
• Crassula subulata var hispida
• Crassula subulata var subulata

• Section Curtogyne ( Haw. ) Toelken Crassula dejecta
• Crassula fallax
• Crassula flava
• Crassula rubricaulis

• Section Kalos Anthes ( Haw. ) Toelken Crassula coccinea
• Crassula fascicularis
• Crassula obtusa

• Section Rosulares Haw. Crassula acinaciformis
• Crassula alba Crassula alba var alba
• Crassula alba var pallida
• Crassula alba var parvisepala

• Crassula barbata subsp. barbata
• Crassula barbata subsp. broomii

• Crassula capitella subsp. capitella
• Crassula capitella subsp. meyeri
• Crassula capitella subsp. nodulosa
• Crassula capitella subsp. sessilicymula
• Crassula capitella subsp. thyrsiflora

• Crassula exilis subsp. cooperi
• Crassula exilis subsp. exilis
• Crassula exilis subsp. sedifolia

• Crassula montana subsp. Montana
• Crassula montana subsp. quadrangularis

• Crassula obovata var dregeana
• Crassula obovata obovata var

• Crassula sediflora var amatolica
• Crassula sediflora var sediflora

• Crassula setulosa var deminuta
• Crassula setulosa var jenkinsii
• Crassula setulosa var longiciliata
• Crassula setulosa var rubra
• Crassula setulosa var setulosa

• Crassula southii subsp. southii
• Crassula southii subsp. sphaerocephala

• Crassula tomentosa var glabrifolia
• Crassula tomentosa var tomentosa

• Crassula vaginata subsp. minuta
• Crassula vaginata subsp. vaginata

• Section Perfilatae Haw. ex DC. Crassula badspoortensis
• Crassula brevifolia Crassula brevifolia subsp. brevifolia
• Crassula brevifolia subsp. psammophila

• Crassula rupestris subsp. commutata
• Crassula rupestris subsp. marnieriana
• Crassula rupestris subsp. rupestris

• Section Columnares Haw. ex DC. Crassula alpestris Crassula alpestris subsp. alpestris
• Crassula alpestris subsp. massonii

• Crassula columnaris subsp. columnaris
• Crassula columnaris subsp. prolifera

• Crassula congesta subsp. congesta
• Crassula congesta subsp. laticephala

• Section Argyrophyllae ( Schönland ) Toelken Crassula alstonii
• Crassula aurusbergensis
• Crassula ausensis Crassula ausensis subsp. ausensis
• Crassula ausensis subsp. giessii
• Crassula ausensis subsp. titanopsis

• Crassula garibina subsp. garibina
• Crassula garibina subsp. glabra

• Crassula globularioides subsp. globularioides
• Crassula globularioides subsp. illichiana

• Crassula lanuginosa var lanuginosa
• Crassula lanuginosa var pachystemon

• Crassula namaquensis subsp. comptonii
• Crassula namaquensis subsp. lutea
• Crassula namaquensis subsp. namaquensis

• Crassula sericea var hottentotta
• Crassula sericea var sericea
• Crassula sericea var velutina

• Section Arta ( Schönland ) Toelken Crassula columella
• Crassula deceptor
• Crassula elegans Crassula elegans subsp. elegans
• Crassula elegans subsp. namibensis

• Section Crassula Crassula perfoliata Crassula perfoliata var coccinea
• Crassula perfoliata var heterotricha
• Crassula perfoliata var minor

• Crassula perfoliata perfoliata var

• Section Globulea ( Haw. ) Harv. Crassula ammophila
• Crassula atropurpurea Crassula atropurpurea var anomala
• Crassula atropurpurea var atropurpurea
• Crassula atropurpurea var cultriformis
• Crassula atropurpurea var purcellii
• Crassula atropurpurea var rubella
• Crassula atropurpurea var watermeyeri

• Crassula mesembryanthoides subsp. hispida
• Crassula mesembryanthoides subsp. mesembryanthoides

• Crassula nudicaulis var herrei
• Crassula nudicaulis var nudicaulis
• Crassula platyphylla var nudicaulis

• Crassula pubescens subsp. pubescens
• Crassula pubescens subsp. radicans
• Crassula pubescens subsp. rattrayis

• Crassula subacaulis subsp. erosula
• Crassula subacaulis subsp. subacaulis

• Crassula subaphylla var subaphylla
• Crassula subaphylla var virgata

From the assignment of unknown species Crassula cordifolia, Crassula Crassula micans and are schmidtii. In addition, there are the hybrids Crassula × justi - corderoyi.

Evidence