思在樹人

青鎖龍屬也是很大的一屬，大多分佈在南半球，南非就有150個品種，可以在分成兩個亞屬。

一年生或多年生草本，小型到樹木狀灌木到2.5米高，少數具有地下塊莖的地下芽

Annual or perennial herbs, or dwarf to arborescent shrubs to 2.5 m tall, rarely geophytes with tubers;

根 纖維質到肉質

Root fibrous to fleshy;

分株 多肉，有時會木質化。

Branch succulent, sometimes becoming woody;

葉片 十字對生，一對同生，厚肉質到膜狀，持續或落葉，無柄或短葉柄，完整，基部有葉鞘，光亮或毛狀或纖毛，有時有明顯的排水器。

Leaves decussate, ± connate within a pair, thickly fleshy to membranous, persistent or deciduous, sessile or shortly petiolate, entire, sheathing basally, glabrous or hairy or papillate, sometimes with conspicuous hydathodes;

花序 帶有單一到多個二歧聚繖花序(dichasium)的聚繖圓錐花序thyrse（主總狀、支聚繖）,有時部分花序會聚集成球狀，很少是單一花朵。

Inf thyrses with solitary to numerous dichasia, sometimes part-Inf glomerate, rarely reduced to solitary Fl;

苞葉 通常像葉片

Bract often leaves-like;

總花梗 存在或與分枝不易區分，短於或相當於葉片長度

peduncle present or indistinct with branchs shorter or as long as the L;

花朵 通常4到5瓣，單系列雄蕊（＝花瓣），大部分都很小

Fl (2- to) 4- to 5- (to 12-) merous, haplostemonous, mostly small;

萼片 4-5，基底溶合

（以下部分要再拍些特寫）

Sep (2-) 4- 5 (-12), fused shortly at the base;

花瓣 4-5，基底合生，頂端通常附加？

Pet (2-) 4 - 5 (-12), shortly connate basally, tips often appendaged;

雄蕊 單一漩渦，基底同生於花瓣並與之交錯（？這要觀察）

St in a single whorl, basally adnate to Pet and alternate with them;

花藥 內含或伸出，沒有端點附加（？）

Anth included or exserted, without terminal appendage;

Nectar scale flat to thickish;

Ca free to sligthly immersed into the receptacle and gradually constricted into short or long Sty terminating in single stigma;