Dalzellia Hassk., in Flora 594. 1865 (non Dalzellia Wight, Podostemaceae.)
Cyanotis Sect. Dalzellia C. B. Clarke in DC., Monogr. Phanerog. 3: 241. 1881.
Perennial herbs, green to purple. Roots fibrous. Stems procumbent, branched, rooting at nodes. Leaves sessile, nearly arrangement in the same plane, elliptic-ovate, succulent; sheath cylindrical; inflorescence terminal, a cincinnus enclosed in biseriate bracteoles, or flowers solitary; bract and bracteoles isophenous, margins ciliate, elliptic-ovate. Flower bisexual , actinomorphic; sepals 3, free, greenish, persistent, boat-shaped, lanceolate; petals 3, free, pink-purple, with white streak in middle, obovate, apex acute, base cuneate; stamens 6, equal; anthers trapezoidal; filaments barbate, the hairs moniliform, white or white-blue, on the outside of the filament; ovary ellipsoid, 3-angled, apex hispid; style barbate. Capsules 3-valved, ellipsoid, locules 2-seeded,apex hispid. Seeds uniseriate, trapezoidal or elliptic in outline, embryotega apical, hilum punctiform.
Species ca. 5, distributed in South Asia to New Guinea; two species in Taiwan.
Rao (1968) 認為Belosynapsis屬植物和Cyanotis屬的分別在於沒有兩排覆瓦狀排列的苞片，本研究觀察B. ciliata花部形態，認為其也具有兩排覆瓦狀排列的苞片，差別應在於本分類群大苞片與小苞片同形，大苞片略大一些，但不像Cyanotis屬植物的大苞片形成佛焰苞狀，將其他小苞片包含在內。另一個用以區別這兩屬的穩定特徵為花瓣是否離生，Cyanotis屬之花瓣合生，而Belosynapsis屬植物花瓣離生，且每一片花瓣中央具有一條白色帶紋。
除此之外，本研究發現省產Cyanotis屬植物在花柱頂端皆有水滴形膨大之構造，雌蕊及雄蕊花絲上的念珠狀毛為藍色；Belosynapsis屬植物花柱頂端沒有特別的膨大，念珠狀的毛在花絲的上方為白色，在下方則為白藍相間。
Hsu (1971, 1978) 採用廣義的Cyanotis屬定義，認為這兩屬除花瓣特徵不同外，果實及種子特徵極為類似，不主張另立一屬；本研究綜合形態學及細胞學資料認為Belosynapsis應為獨立的一屬。
