Ornamental evergreen shrub of Pacific coast of North America having dark green pinnate leaves and racemes of yellow flowers followed by blue-black berries .

北美太平洋沿岸的裝飾性常綠灌木，有深綠色的羽狀的葉子和黃花的總狀花序及藍(lán)黑色的漿果三级视频网站欧美日韩。

Bracteole apex 1-pinnate/pinnatifid; ultimate leaf segments lanceolate, 0.5–5 mm broad; pedicels terete.

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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.

經(jīng)過大量的實(shí)驗(yàn)結(jié)果分析、查閱標(biāo)本和野外調(diào)查字幕网国产在线观看，結(jié)合古植物學(xué)干干干干干干射射、比較形態(tài)學(xué)、演化植物學(xué)和分類學(xué)等理論進(jìn)行分析性感美女被操免费视频，認(rèn)為蘇鐵科原始的類型為羽葉呈二歧狀分叉的種類91黄色视频在线观看，其中最原始的又是羽葉呈三回二歧狀分叉的種類，從這個(gè)羽葉類型逐漸演化出一回二歧狀分叉的羽葉類型日韩精品免费乱码福利视频，再演化出羽葉為單羽狀的類型亚洲三级片在线网址；而單羽狀葉的類群中，又以大孢子葉側(cè)裂片具三回91精品国产自产在线观看48页、二回及一回二歧狀分叉數(shù)量多的種類為最原始亚洲国产一区二区av观看在线，而側(cè)裂片二歧狀分叉數(shù)量少的為較進(jìn)化，側(cè)裂片無二歧分叉的如拳葉蘇鐵類為最進(jìn)化的種類人人扣B人人干B视频免费播放。

Leaves ternate or pinnate or pinnate with simple leaflets.

二回三出復(fù)葉羽狀復(fù)葉或羽狀單葉国产精品色在线播放。

Leaves 3-pinnate; bracteoles 2–3-pinnate, nearly equal to umbellules.

葉3回羽狀；小苞片2-3回羽狀国产精品福利一区，差不多等于小傘形花序日韩欧美精品视频在线观看_。

Leaves 3-pinnate; rays of terminal and lateral umbellules subequal; bracteoles 2-pinnate.

葉3回羽狀；頂生和側(cè)生小傘形花序的傘輻近等長(zhǎng)国产黄色网站在现免费观看；小苞片2回羽狀亚洲AⅤ色福利天堂在线观看。

Leaves 2-pinnate; bracteoles 3-lobed or 1-pinnate, subequal or exceeding flowering umbellules.

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Leaves alternate, odd-pinnate (occasional leaves even-pinnate or 1-foliolate).

葉互生，奇數(shù)羽狀復(fù)葉(偶爾偶數(shù)羽狀復(fù)葉或單身復(fù)葉)99伦乱视频。

Leaves 1–4-pinnate or ternate-pinnate; ultimate segments serrate to incised or pinnate.

留下1-4羽狀的或三出羽狀欧美一級性愛視頻；末回裂片有鋸齒到銳裂的或羽狀。

Branches alternate; leaves pinnate or ternate-pinnate.

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