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- Stamens 30-40, subequal, possibly monomorphic. 雄蕊30-40,近等長,也許單型。
- Branches many per node, deflexed, subequal. 分枝很多每節,外折,近等長。
- Calyx lobes sometimes subequal, persistent. 有時的萼裂片近等長,宿存。
- Corolla lobes 5, subequal, rounded, tube short. 花冠裂片5,近等長,圓形,筒部短。
- Mid-culm branches 3, subequal or central dominant. 中間稈的分枝3,近等長的或中心有勢力。
- Utricles ovoid, subequal to perianth, ca. 3 mm, circumscissile. 胞果卵形體,近等長於花被,約3毫米,周裂。
- Style apex 2-cleft, lobes subulate, equal or subequal. 花柱先端2半裂,裂片,等長或近等長。
- Culm sheath auricles subequal; culm internodes with purple stripes initially. 竿籜耳廓近等長;最初的用紫色的條紋節間的稈。
- Corolla lobes subequal, rounded or lacerate, tube small, yellow or pale red. 花冠裂片近等長,圓形的或撕裂狀,筒部小,黃的或淺紅色。
- Calyx campanulate to tubular, 10-veined, 5-toothed, teeth equal or subequal. 花萼鍾狀到管狀,10脈,5齒,齒等長或近等長。
- Corolla blue-purple, ca.1.2 cm long, white pubescent,2- lipped, upper lip2- lobed, lower lip3- lobed; lobes subequal. 花冠藍紫色,長1.;2厘米,被白色短柔毛,二唇形,上唇2裂,下唇3裂,裂片近相等。
- Corolla blue-purple, ca. 1.2 cm long, white pubescent, 2-lipped, upper lip 2-lobed, lower lip 3-lobed; lobes subequal. 花冠藍紫色,長1.;2厘米,被白色短柔毛,二唇形,上唇2裂,下唇3裂,裂片近相等。
- Female perianth lobes free, subequal or lateral ones slightly larger, all oblong-cymbiform, as long as achene in fruit. 雌花花被裂片離生,近等長的或側生的稍大,全部舟狀長圓形,在果期的等長於瘦果。
- Culm sheath auricles subequal, not covered by base of blade; sheath apically subtruncate. 竿籜耳廓近等長,不通過葉片基部蓋住;頂部的鞘近截形。
- Lower sepal navicular, vertical, with a curved spur;spur subequal to limb, 5-6 mm, apex with a groove or 2-fid. 距近等長於冠檐,5-6毫米,先端具一具凹槽或2裂。
- Buds at culm nodes lanceolate, branches ca. 5, subequal; culm sheath blade erect. 在稈發芽披針形的節,約分開,近等長;竿籜葉片直立。
- Stem absent; panicle, similar to spike or capitulum; stamens subequal to perianth. 莖無;圓錐花序,類似於穗狀花序或小頭花狀序;雄蕊近等長於花被。(4
- Stamens 8, subequal to petals in male flower, reduced and sterile in female flower. 雄蕊8,在雄花中與花瓣近等長,在雌花內退化和不育。
- Lower internodes of culms glabrous; culm sheath apically subtruncate; auricles subequal, usually reflexed. 低節間的無毛的稈;頂部的竿籜近截形;近等長的葉耳,通常反折。
- Longer stamens subequal to petal length, shorter ones subequal to gynoecium length. 較長的雄蕊與花瓣近等長,較短的雄蕊與雌蕊群近等長。