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孢子囊形

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According to the comparative research on Guangnania, the diagnosis of the zosterophytes is expanded. It is suggested that their sporangia have the differentiation in the shape (reniform, rounded/globose to vertically elongate), dehiscence and valves (biconvex or concave/convex).

根据Guangnania的研究和对比,对工蕨类植物的特征进行了扩展,认为孢子囊存在形状(肾形—圆形/球形—纵向伸长)、开裂方式和两瓣的分异。2。

Beautiful spreading fern of eastern North America and eastern Asia naturalized in western Europe; pinnately divided fronds show a slight tendency to fold when touched; pinnules enclose groups of sori in beadlike lobes.

北美东部和亚洲西部一种广泛分布的美丽的蕨类,并移植欧洲西部;当受到外界刺激时羽状半裂复叶略微合拢;二回羽叶包裹珠形叶片的孢子囊群。

Leaves tufted; stipes 15-30 cm long, densely scaly at base, glabrous above; sterile lamina about 60 cm long and 20 cm wide, simply pinnate; pinnae numerous, alternate or subopposite, linear-lanceolate, the largest about 12 cm long and 1 cm wide, base cordate, apex acuminate, margin finely toothed; veins close, forking once or twice and forming areoles near the midrib; fertile lamina similar to sterile ones, but somewhat reduced, about 8 cm long and 0.4 cm wide, lower surface almost entirely covered with sporangia.

叶簇生;叶柄长15-30厘米,基部密被鳞片,向上近光滑;不育叶片长约60厘米,宽20厘米,一回羽状;羽片多数,互生或近对生,线状披针形,最长者长达12厘米,宽约1厘米,顶端长渐尖,基部心形,边缘有细密锯齿;叶脉1-2次分叉,近中脉形成网眼;能育叶与不育叶相似,但较小,长约8厘米,宽约0.4厘米,下部满布孢子囊。

The main characters of this category are: 1 It possesses clear main axes and lateral branches/sporangial stalks; 2 Sporangia terminate the lateral branches or long stalks; 3 With the distinct dehiscing mechanism, the sporangia have the variation in shape, i. e. reniform, rounded or vertically elongate; 4 Primary xylem is of centrarch maturation; 5 Conducting tracheid is G-type.

该类群包括Hsüa,Renalia,Nothia,Sartilmania和Huia,其主要特征为:1)具有明显的主茎轴及侧出的分枝系/孢子囊柄;2)孢子囊顶生于侧枝上或侧生的长柄上;3)孢子囊性状存在变异,为肾形、圆形或纵向伸长,具明显的开裂机制;4)初生木质部发生顺序为心始式;5)G-型输水管胞。

推荐网络例句

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?