特徵描述
作者
YING, SHAO-SHUN
型態特徵
Annual or perennial herbs, rarely small subshrubs, inermous, terrestrial or aquatic, usually with watery juice. Leaves radical or cauline, spirally arranged, rarely subopposite, simple to pinnately lobed; stipules absent or reduced to fine bristles or glands. Flowers usually hermaphroditic, hypogynous, in terminal or axillary racemes, sometimes solitary or several-clustered; sepals 4, free, imbricate, decussate in 2 series, rarely valvate; petals 4, free, usually clawed, alternating with the sepals; stamens mostly 6, 4-dynamous in 2 rows (the outer two stamens shortest) or 2-dynamous or 1–5 by reduction, or more than 6 by division (up to 16), filaments usually free, sometimes winged or dentate, anthers mostly sagittate, 1–2-celled, longitudinally dehiscent, nectaries variously arrayed around base of stamens; ovary syncarpous, of 2 carpels, usually bilocularly divided by a false septum (replum), style usually persistent, simple, stigma discoid, sometimes bifid. Fruit a capsule, dehiscing from below by two valves (a silique when more than 3 times as long as wide; a silicle when less than 3 times as long as wide), rarely lomentoid or indehiscent. Seeds 1-numerous, mostly exalate; embryo large; endosperm scanty or absent; cotyledons large, incumbent, accumbent or conduplicate.
屬
Genera up to 300, with more than 2,500 species of world-wide distribution, but mostly in temperate regions. Twelve genera with 22 species, one variety and one form in Taiwan.
參考文獻
Arabis 筷子芥屬
作者
YING, SHAO-SHUN
型態特徵
Annual, biennial or perennial herbs with simple, bifid or branched-stellate hairs, rarely subglabr-ous. Leaves entire, lobed or pinnatifid, the radical ones usually spatulate and petiolate, the cauline ones sessile, often toothed or lobed. Flowers in racemes, white, yellow (especially when dried) pink or violet, bractless; sepals erect, obtuse, equal or the inner ones somewhat to strongly saccate; petals clawed, entire, longer than sepals; stamens 6, filaments linear, without appendages; ovary with 20–60 ovules, style short, stigma entire or shallowly 2-lobed. Fruit a silique, compressed, sessile, glabrous or hairy, valves flat, sometimes keeled or with a midrib, septum membranous. Seeds in l or sometimes 2 rows, flat, winged or wingless; cotyledons accumbent.
參考文獻
種列表
- Arabis arenosa 沙質擬南芥
- Arabis auriculata var. sypica
- Arabis brassicaeformis
- Arabis dentata
- Arabis drummondii
- Arabis flagellosa 匍匐南芥
- Arabis formosana 台灣筷子芥
- Arabis glabra 旗杆芥
- Arabis halleri 圓葉南芥
- Arabis hirsuta 硬毛南芥
- Arabis laevigata
- Arabis lyrata
- Arabis neglecta
- Arabis pendula 垂果南芥
- Arabis petrogena
- Arabis saxatilis
- Arabis senanensis
- Arabis serrata 齒葉南芥
- Arabis stelleri var. japonica 基隆筷子芥
- Arabis taiwaniana
- Arabis thaliana 阿拉伯芥
- Arabis turrita
