毛缘

Calyx glabrous or sometimes sparsely pubescent, lobes entire or rarely serrulate.

有时的花萼无毛或疏生短柔毛，裂片全缘的或很少有细锯齿。

Spikelets laterally compressed, florets several, all bisexual or lowest sterile and without a palea; rachilla glabrous, disarticulating above glumes and sterile floret and between fertile florets; glumes lanceolate, shorter than lemmas, subequal or unequal, scarious-membranous, 1–3-veined, obtuse to acuminate or aristulate; lemmas ovate-lanceolate, scarious-membranous, 3-veined, long-ciliate on lateral veins, keeled, apex setaceously bidentate with a short, often recurved awn from the sinus; palea shorter than lemma, hyaline, keels very shortly ciliate.

小穗侧面压扁，小花数个，全部不育和没有一内稃的最低的两性的或；高于颖片和不结果的小花无毛，脱节的小穗轴和在肥沃的小花之间；披针形的颖片，短于外稃，近等长或不等长，干膜质膜质，1-3脉，具小芒的钝到渐尖或；卵状披针形，干膜质的外稃膜质，3脉，具长缘毛在侧脉上，龙骨状，先端setaceously具双齿具短，通常下弯从那里那些凹缺；内稃短于外稃，透明，龙骨非常短的纤毛。

Male flowers (3-)5-7 in cymules, pedicellate; bracts triangular, pilose to ciliate, at base with a pair of elongate-spheroidal to elliptic glands touching axis of thyrse and sometimes decurrent; calyx with 3 sepals, fused at base; petals and disk absent; stamens 3; filament and anther of similar length.

雄花(3-)5-7在小聚伞花序，有花梗；三角形的苞片，具柔毛到具缘毛，在基部具一对拉长近球形到椭圆形腺体与轴接触和有时下延；花萼具3萼片，在基部愈合；花瓣和花盘无；雄蕊3；相似的长度的花丝和花药。

Fruit dehiscent siliques or rarely silicles, linear or rarely oblong, terete, 4-angled, latiseptate, or angustiseptate, sessile or rarely shortly stipitate; valves with an obscure to prominent midvein, pubescent on outside, rarely also on inside, keeled or not, smooth or torulose; replum rounded; septum complete, membranous, translucent or opaque, veinless; style obsolete or short, rarely half as long as or subequaling fruit, often pubescent; stigma capitate, entire or 2-lobed.

开裂的果长角果或很少短角果，线形或很少长圆形，，四棱形，具宽隔膜，果实狭隔的或，无梗或很少具短柄；裂爿具一不明显对突出中脉，短柔毛在外面上，在里面也很少，与否龙骨状，近念珠状的平滑或；假隔膜绕行；完全，膜的隔膜，不透明的半透明或，；废退的花柱或短，或的一半很少果，通常短柔毛；柱头头状，全缘的或2裂。

Glumes (1–)3(–5), transitional with basal, sterile lemmas; lemma 7- to many veined, abaxially commonly puberulent and with distinct tessellation, adaxially slightly scabrous with minute setulae, apex acuminate with an awnlike point; palea conspicuously smaller than lemma or equaling in length but much narrower in upper florets, abaxially minutely setulate, 2-keeled, 2–4-veined between and beside keels, apex obtuse or emarginate; lodicules 3, membranous with thickened lower portion, 5–7-veined, margins ciliate, anterior pair of lodicules usually asymmetrical.

颖片(1-)3(-5)，基部，不育的过渡具；外稃7-在很多脉，背面通常被微柔毛并且有清楚棋盘花纹，有微小setulae，芒状点的先端渐尖正面有点粗糙；内稃显著但是非常在上面小花内狭窄的小于外稃或者等长，鳞被3，膜质具加厚更低的份，5-7脉，边缘具缘毛，前面的对鳞被通常不对称。

Spikelets subsessile, biseriate, broadside to rachis, linear to elliptic, laterally compressed, florets 2 to several, rachilla disarticulating above glumes and between florets; glumes narrow, shorter than lemmas or upper glume exceeding lowest lemma, unequal, membranous, 1-veined or upper glume sometimes 3-veined, keeled, acute to emarginate and mucronate, lower glume often with a lobe or tooth on one side; lemmas lanceolate to ovate, membranous, 3-veined, glabrous, lightly keeled or rounded, 2-dentate, midvein produced into an awn, teeth usually also mucronate or awned; palea keels scabrid or ciliolate, often winged.

近无柄，双列的小穗，船舷在轴，线形到椭圆形，侧面压扁，小花2到数枚，高于颖片脱节和在小花之间的小穗轴；颖片狭窄，短，外稃或超过最低外稃的上面颖片，不等长，膜质，1脉或上面颖片有时3脉，龙骨状，锐尖到微缺和短尖，外稃披针形的到卵形，膜质，3脉，无毛，轻而易举龙骨状的或圆形，2有齿，内稃龙骨粗糙或者具短缘毛，经常飞行。

Leaf margin sharply biserrate, abaxially curved pilose, inconspicuously crinite at vein axils.

叶缘锐的具重锯齿，背面的弄弯的具柔毛，难以觉察具长软毛的在脉腋。

Stamens 6, free, all or only 2 or 3 fertile; filaments glabrous or torulose villous; anthers parallel or slightly divergent, longitudinally dehiscent, rarely dehiscent by apical pores; staminodes 1--3; antherodes 4-lobed and butterflylike, 3-sect, 2-lobed and dumbbell-shaped, or entire.

雄蕊6，离生，全部或者只2-3个能育；花丝无毛或者有念珠状长柔毛；花药平行或者稍分叉，纵向开裂，很少顶孔开裂；退化雄蕊1-3；退化花药4裂成蝴蝶状，或3全裂，或2裂成哑铃形，或者全缘。

Sepals 0.5-0.7 mm, connate at base or to ca. 1/4 their length, glabrous or margin irregularly ciliolate, persistent in fruit.

0.5-0.7毫米的萼片，在基部合生或对长约他们的长度，具短缘毛的无毛或边缘不规则，在果其宿存。

Leaves 2 or 3 per ultimate branch; auricles and oral setae commonly absent; ligule strongly exserted, arcuate, ciliolate; blade lanceolate to linear-lanceolate, 7–16 × 1–2 cm.

每末级的分枝留下2或3；通常的叶耳和口头的刚毛无；叶舌强烈外露，弧曲，具短缘毛；叶片披针形的到线状披针形， 7-16 * 1-2 厘米新嫩枝4月2n = 48×。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。