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Inflorescences with a single cymule, rarely a second in unusually robust material, sometimes elongated and branched; corona lobes lanceolate to circular, flattened, gynostegium rounded to almost flat, not narrowed above outer corona lobes; corolla yellow
花序具一单的小聚伞花序,很少在异常粗壮的材料里的一秒,有时拉长和分枝;披针形的副花冠裂片对圆,扁平,圆形对几乎平,在上面不缩小外部副花冠裂片;花冠黄 6
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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.
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。
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Female flowers solitary or several and male mixed in axillary cluster; pedicels 2-6 cm; calyx yellow-green, 6-lobed; sepals slightly thick, biseriate, outer obovate or subspatulate, ovate-elliptic, 6-7 × 3-4 mm, inner shorter, obovate, ca. 5 mm, with purple stripes; disk absent; pistil depressed globose, ca. 2 × 2.7 mm, 3-locular; styles 3, bifid at apex, arms recurved.
雌花单生或数个雌花和雄花在腋生簇束里混生;花梗2-6厘米;花萼黄绿色,6裂;萼片稍厚, 2列,外部倒卵形或近匙形,卵状椭圆形, 6-7 * 3-4 毫米,内部的短,倒卵形,长约5毫米,有紫色条纹;花盘无;雌蕊扁球形,约2×2.7毫米,3室;花柱3,在先端2裂,裂片下弯。
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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。
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Flowers bisexual, solitary, rarely in clusters of 2 or 3; pedicel short. Perianth white to blue or lavender, tubular-campanulate or nearly funnelform; segments 6, connate.
花两性,单生,很少在2或3的簇生里;花梗短花被白色到蓝色或者淡紫色,管状钟状或者差不多漏斗状;裂片6,合生。
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Basal leaves petiolate, not rosulate, simple or pinnatisect with 1-6 leafletlike lateral lobes on each side.
具叶柄的基生叶,不莲座状,单或具1-6侧面裂片在每边。
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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。
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Leaves simple; petiole 1.5--4(--7) mm; leaf blade ovate or lanceolate in outline, pinnatipartite or pinnatisect, sometimes pinnatilobed, 0.5--5 × 0.3--3 cm, leathery, both surfaces sparsely puberulous or subglabrous, base cuneate or subtruncate; lobes in 1--3(or 4) pairs, undivided and linear or subrhombic and unequally 2- or 3-lobulate, 4--15 mm, apex acute; lobules ovate, triangular, or linear; midvein abaxially slightly prominent or flat, inconspicuous.
单叶 叶柄1.5-4(-7)毫米;叶片卵形或披针形轮廓,羽状深裂或羽状全裂,有时羽状浅裂的, 0.5-5 * 0.3-3 厘米,革质,两面稀疏被微柔毛的或近无毛,基部楔形或近截形;在对,不裂和线形或1-3(或4)内裂片和不相等2或3具小裂片,4-15毫米,先端锐尖;卵形,三角形的小裂片,或线形;中脉的背面的稍突出或平,不显眼。
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Leaves sessile, linear-lanceolate to subulate, 5--7(--10) X 0.7--2 mm, base slightly dilated, submembranous, leathery, glabrous or sparsely pubescent on margin, margin cartilaginous, apex acuminate, cartilaginous; midvein raised abaxially.
叶无柄 线状披针形的到钻形, 5-7(-10)X 0.7-2毫米,背面中脉突起花葶单生,1或2花,在毫米,在叶内隐藏,具长柔毛;苞片1或2,裂片三角形,具缘毛,先端锐尖;脉5,不明显。
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Corolla dark blue, without lines, lobes narrowly oblong; stem leaves oblong-spatulate to oblong, base obtuse; stem simple
花冠深蓝色,没有线,裂片狭长圆形;茎生叶匙形长圆形的到长圆形,基部钝;茎单生 1 Lomatogonium perenne 宿根肋柱花
- 更多网络解释与单裂片的相关的网络解释 [注:此内容来源于网络,仅供参考]
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Gelidium:石花菜属
常见的红藻包括掌状红皮藻、紫菜、石花菜属(Gelidium)、角叉菜属(Chondrus). 北大西洋的掌状红皮藻(Rhodymenia palmata)淡紫红色,由扁平的单生或丛生的叶状体所构成,外表扇状,分成多数二叉型裂片. 低潮时,大西洋岩石海岸潮间带的下半部,
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Menispermaceae:防己科
单叶互生,近肾形,先端深凹,基部心形,裂片黄藤伪品--大叶藤(Dayeteng) [来源] 防己科(Menispermaceae)植物大叶藤Tinomiscium tonkinense Gagnep.的干燥藤茎.