萼

Fruit sets in another Mussaenda species, M. parviflora. Based on our survey, we found many of the

细胞排列上，都与正常的花瓣类似，加上有著显著的颜色，一般皆认为这些叶状萼片在功能

Petals 6, nectariferous, much smaller than sepals or absent.

花瓣6，分泌蜜汁，比萼片小得多或者无。

Disk intrastaminal, nectariferous, thin to ± fleshy, entire or lobed, glabrous or rarely pubescent, free from ovary or tightly surrounding it, or adnate to calyx tube.

花盘雄蕊内，分泌蜜汁，薄的到多少肉质，全缘或浅裂，无毛或很少短柔毛，与子房离生或紧密包围子房，或贴生于萼筒。

Flowers perfect and hermaphroditic or occasionally unisexual, actinomorphic or zygomorphic,(2-)4(-7)-merous, axillary, in leafy spikes or racemes or solitary, or occasionally in panicles, all but Ludwigia with distinct floral tube, nectariferous within.

偶有的完全花和两性的或单性，辐射对称或者两侧对称，(2-)(-7)瓣，腋生的4，在多叶穗状花序或总状花序或单生内，萼片绿色或有色，镊合状排列。

Leaves all basal, simple, 3-sect, or ternate; petals ca. 1/3 as long as sepals, not petaloid (instead specialized nectariferous organs); style ca. 2 × as long as ovary; follicles cubic-globose

叶全部基生，单，3裂，或三出；花瓣约1/3倍于萼片，不瓣状(代替为特化的分泌蜜汁器官)；花柱长约2 *倍于子房；蓇葖果立方球状 18 Urophysa 尾囊草属

In Nymphaea, 4 sepal primordia initiated from abaxial to adaxial side of the floral apex. Petal and stamen numerous, initiated in spirals. The apex of floral primordium caved in at the late stage.

睡莲的萼片4枚，向轴式发生；花瓣和雄蕊多数，螺旋状向心式发生；花原基的顶端在后期向下凹陷；心皮6～8枚，呈一轮同时发生，为对折型心皮。

Calyx tube obconical and completly adnate to ovary, 5--10-ribbed, 5-toothed.

萼筒倒锥状和completly贴生于子房，5-10 用助材加固，齿状。

Calyx teeth obsolete. Petals obcordate, white, often purplish on reverse, ca.

萼齿不明显倒心形的花瓣，白色，通常在反面上略带紫色的，约2×1.2毫米。

Petals purple, lavender, or white; blade obovate or narrowly obcordate, apex rounded or emarginate; claw obscurely to strongly differentiated from blade, shorter than to as long as sepals.

花瓣紫色，淡紫色，或白色；叶片倒卵形或者狭倒心形，先端圆形或微缺；瓣爪不明显到强烈与区别的叶片，对倍于萼片的短于。

Petals white, pink, or purple; blade broadly obovate, obcordate, spatulate, or oblanceolate, apex obtuse or emarginate; claw subequaling sepals or longer.

花瓣白色，粉红色，或紫色；叶片宽倒卵形，倒心形，匙形，或倒披针形，先端钝的或微缺；近相等的瓣爪萼片或更长。

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。