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alternisepalous相关的网络例句

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与 alternisepalous 相关的网络例句 [注:此内容来源于网络,仅供参考]

Petals alternisepalous,(2-)4, absent in female flowers of some Myriophyllum , imbricate, longer than sepals, often deciduous with stamens.

花瓣与萼片互生,(2-)4,但是Myriophyllum的一些种类雌花无花瓣,花瓣覆瓦状排列,比萼片长,通常与雄蕊一起脱落。

Stamens 1 or 2 × as many as sepals; filaments short, slender; anthers basifixed, mostly oblong or linear, 4-loculed, dehiscing by slits, antisepalous anthers sometimes somewhat longer than antipetalous ones; pollen grains shedding at 3-celled stage. Ovary inferior, 1(or 2)- or 4-celled, septa solid or practically absent (present only at base and apex of ovary); styles as many as sepals, alternisepalous, free, mostly short, grading into globose or subulate stigmas, spreading in fruit; stigmatic papillae hairlike; ovules as many as styles, rarely 1, apical, pendulous, anatropous.

雄蕊1或2 *同数萼片;花丝短,纤细;花药基着,通常长圆形或者线形,4室,纵向开裂,对萼花药稍比对瓣花药长;花粉粒在3室的阶段散落子房下位,1(或者2)或4室,隔膜实心或几乎无(只在基部和子房先端存在);花柱和萼片同数,与萼片互生,离生,柱头乳突毛发状;胚珠与花柱同数,很少1,顶生,倒生。

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