片状的

Secondly, according to the stem and leaf anatomy, leaf epidermis, pollen morphology and floral development, it is found that there are no close relations between Acorus and Typhales, especially in the aspect of floral development. In the course of floral development of A. calamus, neither bracteloe primordium nor common primordium occurs in the whole course. Early development of the flower is strongly unidirectional. Three shield carpels develop into a pistil. In Sparganium fallax, each female flower has a bracteole. The bracteole primordium and the floral primordium originate from a complex structure. A single saccate carpel develops into a pistil. In staminate flowers, petal and stamen primordia initiate spirally.

菖蒲属与香蒲目的茎叶解剖特征、叶表皮特征、花粉特征及花器官发生特点等亦存在着明显区别，特别是花器官发生特点差异尤为显著，如菖蒲属花器官发生过程中，没有苞片原基，也不存在任何形式的复合原基，花被与雄蕊原基均以单向性方式发生，雌蕊由3心皮发育而成，具有"盾状心皮"的特点等，黑三棱属则有苞片原基发生，且苞片原基与雌花原基起源于共同的复合结构，雄花的花被原基和雄蕊原基均以螺旋状方式发生，雌蕊由单心皮发育而成，未发现有2或3个心皮原基或其痕迹的现象，体现出"囊状心皮"的特点。

Sepals 3(or 5); lateral sepals free or connate, margins entire or serrate; lower sepal large, petaloid, usually navicular, funnelform, saccate, or cornute, tapering or abruptly constricted into a nectariferous spur broadly or narrowly filiform, straight, curved, incurved, or ± coiled, swollen at tip, or pointed, rarely 2-lobed, rarely without spur. Petals 5, free, upper petal flat or cucullate, small or large, often crested abaxially, lateral petals free or united in pairs. Stamens 5, alternating with petals, connate or nearly so into a ring surrounding ovary and stigma, falling off in one piece before stigma ripens; filaments short, flat with a scalelike appendage inside; anthers 2-celled, connivent, opening by a slit or pore.

萼片3(或5)；侧萼片离生或者合生，边缘全缘或者有锯齿；更低的萼片大，瓣状，通常舟形，漏斗状，囊状，或具角状突起，渐减突然或缢缩进一分泌蜜汁具距或宽狭丝状，花瓣5，离生，上面的花瓣平坦的或者兜状，雄蕊5，与花瓣互生，合生或者近合生成环而围绕子房和柱头，在柱头成熟之前完整地从上面落下；花丝短，扁平，在里面的有一鳞片状附属物；花药2室，靠合，通过一条裂缝或者孔开裂。

Optical microscope, scanning electron microscope and X-ray diffraction analysis have revealed that dawsonite mainly occur in the feldspar-rich sandstone and pyroclastic rocks, either as cements filling inter-grain pores as radical, bunchy, rosette, intricately trichoid, and platy collectives, or as replacement of feldspar and lithic grains with bunchy and paty shapes.

片钠铝石主要发育在油气储层或CO2气储层中富含长石的砂岩和火山碎屑岩中。在含片钠铝石砂岩和火山碎屑岩中，片钠铝石以放射状、束状、杂乱毛发状、球状和板状等集合体充填孔隙，或呈束状和板状交代长石和岩屑。片钠铝石及其共生的铁白云石都是最晚形成的自生矿物组合。

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。

Sepals imbricate or valvate, rarely spathaceous, mostly (2 or)3-6, rarely more, usually free or connate at base only, sometimes partly united into a tube, caducous or persistent, rarely accrescent. Petals 3-8, rarely more, often isomerous and alternating with sepals, free, imbricate or valvate, rarely contorted, similar to sepals or not, sometimes with a fleshy adaxial basal scale, or petals absent. Disk present, entire, lobed, or comprised of free or connate disk glands, these extrastaminal, interstaminal, or intrastaminal, or extragynoecial, or disk absent.

萼片覆瓦状或镊合状排列，很少佛焰苞，几乎(2或者)3-6，很少更多，通常离生或者只是基部合生，花瓣3-8，很少更多，通常与萼片同质并且互生，分离，覆瓦状或镊合状排列，很少旋转状，与萼片相似或不相似，有时在近轴基部有一个肉质的鳞片，或花瓣无。

Sepal 5, fu covers with tiles shape is arranged, chang Sucun, corollaceous bell form, funnel form, tall foot butterfly form or earthen jar form, brim ministry is shallow 5 crack or deep 5 crack, rotate when bud or tweezers closes account; Staminal 5, on canister of move unripe Yu Guan, hide inside or appear, pollen bead does not have thorn or aculeate, on ovary, often be a cup of shape or surround for flower disc place of dissension, 1-4 room, every room contains 1-2 bead ovule, style 1-2, post is not cracked or 2 crack, rare 3 crack, or 2-4 is cracked.

萼片5片，覆瓦状排列，常宿存，花冠钟形。漏斗形。高脚蝶形或瓮形，檐部浅5裂或深5裂，芽时旋转或镊合状；雄蕊5枚，着生于冠筒上，内藏或外露，花粉粒无刺或有刺，子房上位，常为杯状或为分裂的花盘所包围，1-4室，每室含1-2粒胚珠，花柱1-2个，柱头不裂或2裂，稀3裂，或2-4裂。

Inflorescence a terminal panicle, raceme, or spike, dense or lax, covered by 1--3 spatulate involucral bracts when immature; bracts open to base, rarely hooded, each subtending 1 flower or a cincinnus of 2 to many flowers; bracteoles open to base or tubular, rarely hooded, sometimes absent.

花序一顶生圆锥花序，总状花序，疏松的或穗状花序，紧密或疏松，未发育完全时被1-3匙形总苞片覆盖；苞片打开至基部，很少盔状，每苞片着生1花或蝎尾状聚伞花序的2到多数花；小苞片打开至基部或管状，很少盔状，有时无。

Sepals narrowly lanceolate to ovate-lanceolate or ligulate; style shorter than 1 cm; bracts lanceolate or long ligulate.

萼片狭披针形到卵状披针形或舌状；花柱短于1厘米；苞片披针形的或更长舌状。

Scape usually longer than leaves, with 2-3 flowers each with 1bract, floral bract hooded, broad-ovate, as long as ovary, blunt and usually 3-lobed at apex; flower green-yellow, dorsal sepal white with yellow-green veins and green base, elliptic, 4-4.5cm long, short-pointed at apex, keeled on back, pubescent at base inside, petals very long, pendulous, twist, linear, 8.5-12cm long,6mm wide in middle; lip reversed helmet-shaped, longer than dorsal sepal, with claw almost as long as hood, side lobes inflexed, auricles large and nearly broad-triangular; staminode obcordate; stamens with thick and short filaments; ovary rostrate, 5.5cm long, glabrous.

花茎常长于叶，具2~3朵花，每花具一枚苞片，花苞片兜状，宽卵形，和子房等长，顶端钝而常3浅裂；花绿黄色，重萼片白色而有黄绿色的脉和绿色的基部，椭圆形，长4~5.5cm ，短尖，背面具龙骨状突起，基部内侧被短柔毛；花瓣极长，悬垂，扭曲，条形，长8.2~12cm ，中部宽约6mm ；唇瓣倒盔状较中萼片长，具爪，爪几乎和兜等长，具内折侧裂片，耳大而近阔三角形；退化雄蕊倒心形，上面基部具一个角状突起；雄蕊具短粗的花丝；子房具喙，长约5.5cm ，无毛。

Moreover, its microstructural characters possess several configurations under TEM, which are (1) ferrite laths with obvious interface,(2) ferrite laths without obvious interface, but the interface can be discerned faintly from the linear arrangment of those directional islands,(3) the coexistence of ferrite laths and non--equiaxed grains. These are somewhat different from those of weld structures, which are generally thought to consist of an assemblage of interwoven ferrite laths.

管线用针状铁素体钢热轧板材中有明显界面的板条束或针状片条束；没有明显界面的板条束或针状片条束，可根据条状物或岛状物的有方向性的线状分布依稀辨别界面的存在；板条或针状片条与非等轴晶共存等多种不同形态，并不象焊接组织那样通常是单一的针状片条束或板条束形态。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。