具三裂片的

As a result of analysis to many of the results of experiment, checked up on specimens, field investigation and combining with the theories of palaeobotany, comparative morphology, evolutional morphology of vascular plants and taxonomy, it can be concluded as following: the primitive sorts of Cycadaceae are the sorts that pinnate leafs are dichotomy; among these, the sort that pinnate leafs are tripinnate-dichotomy is most primitive, from this sort gradually evolve to bipinnate-dichotomy, to only for monopinnate-dichotomy, from this sort evolve to the sorts that pinnate leafs are simply pinna; among the sorts of simply pinna, the species that segments of megasporophyll possess much more triplicate to monodichotomy are most primitive.

经过大量的实验结果分析、查阅标本和野外调查，结合古植物学、比较形态学、演化植物学和分类学等理论进行分析，认为苏铁科原始的类型为羽叶呈二歧状分叉的种类，其中最原始的又是羽叶呈三回二歧状分叉的种类，从这个羽叶类型逐渐演化出一回二歧状分叉的羽叶类型，再演化出羽叶为单羽状的类型；而单羽状叶的类群中，又以大孢子叶侧裂片具三回、二回及一回二歧状分叉数量多的种类为最原始，而侧裂片二歧状分叉数量少的为较进化，侧裂片无二歧分叉的如拳叶苏铁类为最进化的种类。

Leaves crowded near apex of the trunk, spirally arranged; stipes dark brown, with sharp spines; lamina large, oblong, tripinnate; pinnae 17-20 pairs, alternate, longest one to 60 cm long, the basal one reduced; rachis short-spiny; pinnules 18-20 pairs, sessile or nearly so, lanceolate, to 10 cm long and 2.5 cm wide, divided almost to the costa; segments more or less falcate, toothed.

叶螺旋状排列，聚生於茎端；叶柄棕色，具锐刺；叶片大，长矩圆形，三回羽状深裂；羽片17-20对，互生，最大的长达60厘米，基部一对缩短，羽轴有短刺；小羽片18-20对，无柄或近於无柄，披针形，长达10厘米，宽2.5厘米，深裂几达中脉；末回裂片多少镰状，有齿。

Basal petioles 10–20 cm; blade broad-triangular, 10–15 cm, ternate-2-pinnate; pinnae petiolulate; petiolules 3–6 cm; ultimate segments subovate, 3–11 × 2–6 cm, undivided or 2–3-lobed, both surfaces slightly roughened, sharply serrate or doubly serrate.

基部的叶柄10-20厘米；叶片宽三角形，10-15厘米，三出2回羽状；羽片具小叶柄；小叶柄3-6厘米；末回裂片近卵形， 3-11 * 2-6 厘米，不裂或2-3浅裂，两面稍变得粗糙，锐的有锯齿或重锯齿。

Stipules absent. Leaves alternate, simple, odd-pinnate, or digitately trifoliolate; blades of simple leaves entire at margin, those of compound leaves crenulate, crenate, lobulate, or rarely entire at margin.

托叶无。叶互生，单，奇数羽状复叶，或者掌状具三小叶；单叶的叶片边缘全缘，复叶的边缘具细圆齿、圆齿，或具小裂片，或者很少边缘全缘。

Leaves bluish green with prominent white veins, petiolate; blade 3–4-ternately dissected; ultimate segments linear, plane or falcate.

叶带蓝色的绿色的具突出的白色的脉，具叶柄；叶片3-4三出多裂；末回裂片线形，平面或镰刀形。

Basal leaves 5--10; petiole 2--6 cm; blade ternate, or sometimes simple, pentagonal or broadly ovate in outline, 0.6--1.5 × 1--2.4 cm, thinly papery, subglabrous or abaxially puberulent; leaflets petiolulate, rhombic, 2- or 3-lobed or 2- or 3-partite, sometimes 1--2 × 3-sect and with ultimate segments lanceolate-linear; central lobe rhombic-obovate, 3-lobed or 3-partite.

基生叶5-10；叶柄2-6厘米；叶片三出，或者有时单，五边形的或宽卵形轮廓的， 0.6-1.5 * 1-2.4 厘米，薄纸质，近无毛或背面被微柔毛；小叶具小叶柄，菱形的，2或3裂或2或3 分裂的，有时1-2×3全裂并且具末回裂片的有时披针形线形的；中央裂片菱形倒卵形，3浅裂或分裂。

Leaves petiolate, sheath narrow; blade ternate-pinnate or pinnatisect, membranous; ultimate segments filiform to lanceolate.

叶具叶柄，鞘狭窄；叶片回三出羽状或羽状全裂，膜；末回裂片丝状的到披针形。

Leaves 1--3 × ternately sect or subpinnately compound, long petiolate.

叶 1-3 *三出的裂片或者近羽状复叶，具长叶柄。

Capsule oblong, trigonous, ca. 5 mm, 3-valved; posterior valve with 1 seed, indehiscent; other 2 valves each with 2 seeds, dehiscent.

蒴果长圆形的，三棱，约5毫米，3瓣裂；后面裂片具1种子，不裂；其他2裂爿每个具2种子的，开裂。

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。