Herbs, subshrubs, or shrubs. Leaves usually opposite, rarely alternate, stipulate or estipulate; leaf blade simple. Inflorescence 1-flowered or cymose, sometimes racemelike or paniclelike. Flowers bisexual, actinomorphic. Sepals 5; outer 2 smaller, sometimes absent. Petals (3 or) 5, white, pink, yellow, or orange, sometimes with ± black blotches at base, crumpled in bud, caducous. Stamens many; filaments free, unequal in length, inserted in elongated or discoid torus; anthers 2-thecate, longitudinally dehiscent. Gynoecium of 3-5(-10) carpels; ovary superior, 1-loculed or imperfectly 3-5-loculed; placentas parietal; ovules 2 to many, orthotropous, rarely anatropous; style 1; stigmas 3. Capsule leathery or woody, loculicidal. Seeds small, often angled and coarse on surface. Embryo often curved, or circinate; cotyledons narrow; endosperm powdery or cartilaginous.
Eight genera and ca. 170 species: N Africa, SW Asia, and Europe, mostly in the Mediterranean region, extending to E Africa (Somalia) and C Asia, also in North and South America; one species in China.[1]
When placed before a specific epithet, indicates the taxon is of known hybrid origin. The basic number of chromosomes in a polyploid series.
Habit: Evergreen.
Flowers: Bloom Period: March, April, May. • Flower Color: cream, tan
Culture: Space 24-36" apart.
Sunlight: Sun Exposure: Full Sun.
Temperature: Cold Hardiness: 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b. (map)
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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