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脉状

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Actinodromous(palmate; digitate) Describing a form of leaf VENATION in which three or more primary veins radiate from the base of the lamina toward the margin, as in sycamore, resulting in a leaf that has several large lobes or several leaflets all originating at the same point.

具掌状脉的:叶子脉序的一种类型。是由叶基分出多条主脉,主脉间又多次分枝,形成细脉。结果往往是在一片叶中,具有起源于同一点的多个裂片或小叶。

Spikelets with 1 floret (very rarely 2), rachilla disarticulating above glumes, with penicillate extension lying against the palea; glumes subequal, usually slightly longer than the floret, rarely slightly shorter, membranous, 1–3-veined, apex acute or acuminate; floret callus bearded, hairs usually 1/3 as long up to about equaling floret; lemma thinly to firmly membranous,(3–)5-veined, dorsally awned or awnless, apex erose, denticulate or 2–4-toothed; awn geniculate or straight, its position varying from near base to near apex, usually inconspicuous, up to twice length of lemma but occasionally reduced to a subapical mucro or absent; palea 2/3 as long to subequaling lemma.

小穗具1小花(极少2),高于颖片,具具毛撮的扩展对内稃躺脱节的小穗轴;通常,近等长的颖片稍长于那些小花,很少稍短,膜质,脉,先端锐尖或渐尖;作为长的可达的通常的公然反对的小花结茧,头发1/3大约等于小花;稀疏外稃到坚定膜,(3-)5-脉,背具芒或者啮蚀状的顶,或者2-4齿状的具小齿,awnless;芒膝曲或者直,作为近相等外稃的长时期的内稃2/3。

Fruit dehiscent siliques, oblong or linear, latiseptate, sessile; valves papery, navicular, smooth, with a prominent midvein and marginal veins; replum rounded; septum complete, membranous, with a central band and two longitudinal veins; style less than 1 mm; stigma capitate, entire.

果开裂的长角果,长圆形或线形,具宽隔膜,无梗;裂爿纸质,舟形,滤波,具一突出和边缘脉;假隔膜绕行;完全的隔膜,膜质,具一中心条纹状和二纵向脉;花柱不到1毫米;柱头头状,全缘。

Leaf blade abaxially covered with punctiform waxy scalelike trichomes, apex acuminate to rarely acute; secondary veins 6-10 on each side of midvein; cupule bowl-shaped, 0.5-0.8 cm

为点状的腊制的鳞片状的毛状体,对很少锐尖的先端渐尖所覆盖的叶片背面;次脉6-10在中脉两边各;壳斗碗形,0.5-0.8厘米 54 Lithocarpus iteaphyllus 鼠刺叶柯

Rachis of inflorescences covered with scalelike trichomes; leaf blade secondary veins 6-10 on each side of midvein

为鳞片状的毛状体所覆盖的花序轴;叶片次脉6-10在中脉两边各 86 Lithocarpus mairei 光叶柯

Petiole 1.5-2 cm, glabrescent or sparsely villous to densely pubescent or tomentose; leaf blade ovate, ovate-oblong, or obovate-oblong, 8-15 × 4-5 cm, abaxially sparsely to densely villous along midvein and lateral veins or densely pubescent and tomentose, adaxially sparsely villous or glabrescent, base unequally cordate, margin irregularly and doubly setiform serrate, apex acuminate or caudate-acuminate; lateral veins 15-20 on each side of midvein.

叶柄1.5-2厘米,后脱落或去密被短柔毛的疏生长柔毛或者;叶片卵形,卵状长圆形,或倒卵形长圆形, 8-15 * 4-5 厘米,背面稀疏到或者密被短柔毛和被绒毛密被长柔毛沿中脉和侧脉,侧脉15-20在中脉两边各。

According to modes of occurrence, auriferous quartz veins might be divided into three types:(1) bedding quartz veins;(2) ferriferous dolomite quartz veins;(3)quartz veins along NE trending joints.

根据含金石英脉的产状可将其分为三种类型:①顺层石英脉;②含铁白云石石英脉;③NE向节理石英脉。

They all have the typical structure of leaf of C4 plant, but out of the ordinary is that the structure of the midrib is alike the parallel veins and there is a layer of fiber cells between the phloem and the bundle-sheath of vein in the midrib and big parallel veins while the outer wall of the bulliform cells is less cuticularized.

摘 要:以7个杂交狗牙根品种的叶片进行解剖研究,结果表明,各品种均具禾本科 C4植物叶片典型结构,其独特处是:中脉结构与平行脉相似;中脉维管束、平行脉大维管束的维管束鞘内侧韧皮部外有一层纤维细胞;泡状细胞外壁很少角化。

Spikelets oblong to gaping, shining, laterally compressed, florets 2–3(–5), disarticulating below each floret; rachilla pilose, extended beyond uppermost floret; glumes lanceolate to oblong, subequal,± equaling spikelet, membranous, shining, keeled, lower glume 1-veined, upper glume 1–3-veined; floret callus small, pubescent to conspicuously bearded; lemmas lanceolate to oblong, hyaline to shiny cartilaginous, back rounded, finely 4-veined (5th midvein extended into awn), glabrous, awned from near base or in lower half, apex membranous, broad, 4-toothed or denticulately truncate; awn straight or weakly geniculate, usually not exserted from spikelet; palea hyaline, subequal to lemma.

小穗长圆形为了张口,发亮,侧面压扁,小花2-3(-5),在每小花下面脱节;小穗轴具柔毛,在最重要的小花以外延长;披针形的颖片到长圆形,近等长,多少等长,膜质,发亮,龙骨状,下部颖片1脉,上面颖片1-3-脉;小花结茧小,青春期对显著公然反对;外稃披针形的到长圆形,对发亮软骨透明,背面圆形,好4脉(中脉第5 延伸进芒),从小穗直或者身体虚弱膝曲,通常不外露的芒;透明的内稃,近等长于外稃。

Leaves opposite , very rarely stipulate, petiolate, entire, leathery to papery, usually glabrous; secondary veins usually prominent, numerous to few, oblique to perpendicular to midvein; tertiary veins reticulate, with adaxial brownish transvenous resin canals and abaxial linear or intervenous translucent glands; petiole often with basal liguliform appendage.

叶对生 ,极少具托叶,具叶柄,全缘,革质到纸质,通常无毛;次脉通常突出,许多对很少,偏斜到与中脉垂直;第三脉网状,具正面带褐色的transvenous树脂道并且背面线形或脉间的半透明的腺体;叶柄通常具基生舌状的附属物。

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