齿片

Spikelets laterally compressed, florets several, all bisexual or lowest sterile and without a palea; rachilla glabrous, disarticulating above glumes and sterile floret and between fertile florets; glumes lanceolate, shorter than lemmas, subequal or unequal, scarious-membranous, 1–3-veined, obtuse to acuminate or aristulate; lemmas ovate-lanceolate, scarious-membranous, 3-veined, long-ciliate on lateral veins, keeled, apex setaceously bidentate with a short, often recurved awn from the sinus; palea shorter than lemma, hyaline, keels very shortly ciliate.

小穗侧面压扁，小花数个，全部不育和没有一内稃的最低的两性的或；高于颖片和不结果的小花无毛，脱节的小穗轴和在肥沃的小花之间；披针形的颖片，短于外稃，近等长或不等长，干膜质膜质，1-3脉，具小芒的钝到渐尖或；卵状披针形，干膜质的外稃膜质，3脉，具长缘毛在侧脉上，龙骨状，先端setaceously具双齿具短，通常下弯从那里那些凹缺；内稃短于外稃，透明，龙骨非常短的纤毛。

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。

Leaf blade abaxially pilose or sparsely pubescent; teeth along bract margins and sometimes along leaf blade margins aristate and with a claviculate apical gland; hypanthium outside basally pilose to subglabrous; sepals margin sparsely ciliate.

叶片背面具柔毛的或疏生短柔毛；沿着苞片边缘和有时齿沿着叶片边缘具芒并且具具卷须顶端腺体；基部在外面的托杯具柔毛的到近无毛；萼片边缘疏生具缘毛。 21 C。 dolichadenia 长腺樱桃

Spikelets 3–4 mm, brown; callus hairs a little shorter than spikelet, brown; lower glume oblong-lanceolate, papery becoming herbaceous toward apex, back brown-hirsute, apex narrowly truncate; lower lemma 3/4 length of glumes; upper lemma oblong, obtuse and awnless or minutely mucronate, varying to shortly 2-toothed and awned from sinus; awn twisted, bent, up to 6 mm.

小穗3-4毫米，棕色；胼胝体毛一小短于小穗，棕色；狭的更低的颖片长圆状披针形，纸质的变得的草质的向先端，背面棕色具粗毛，先端截形；更低的外稃3/4段颖片；上面外稃长圆形，短尖的钝和awnless或微小的，变化随着短2齿和从那里凹缺；芒扭曲，弯曲，可达6毫米花粉囊3，1.6-2.2毫米。

Spikelets all alike, somewhat laterally compressed, with 1 to several fertile florets; rachilla usually disarticulating below each floret, occasionally strictly 3 florets with lower 2 staminate or barren and of different appearance from upper fertile floret, then disarticulating above glumes and florets falling together; glumes persistent, often equal to spikelet or at least longer than first floret, commonly membranous with broad, shining, hyaline margins; floret callus bearded; lemmas hyaline to leathery, 3- to several-veined ( Coleanthus 1-veined), apex entire or denticulate, awned from back, rarely awnless; awn usually geniculate with twisted column; palea hyaline, subequaling or much shorter than lemma.

全部一样的小穗，有点侧面压扁，具1到数个能育的小花；脱节的通常小穗轴在下面每小花，偶尔严格加雄蕊或者无意义的更低的2的3小花和上面肥沃小花的不同外表，然后脱节的上述颖片和小花结合起来；宿存的颖片，等于小穗或长于前小花，宽的膜质具，发亮，透明边缘的通常的至少的通常；公然反对的小花结茧；透明的外稃到革质，3-到数枚脉(Coleanthus 1脉)，先端全缘或具小齿，从背面，很少awnless那里具芒；用盘旋的柱子通常膝曲的芒；透明的内稃，近相等或者远短于外稃。

In contrast, P. obliquum has lamina with basal pinnae contracted, scales of petiole brown adaxially, scales of rachis up to 2.3×0.5 mm, pinnae green, chartaceous, matt adaxially, and serrulate on margin, and microscales 0.2-0.5×0.1-0.2 mm.

obliquum相似，但吞天井耳蕨的叶片基部最宽，向基部不缩短，叶柄鳞片近轴面深棕色，叶轴鳞片达3.6×0.8mm，羽片深绿色，近革质，向轴面有光泽，边缘具略波状微齿或近全缘，小鳞片达2×0.5mm；而斜羽耳蕨的叶片的基部缩短，叶柄鳞片向轴面棕色，叶轴鳞片达2.3×0.5mm，羽片绿色，草质，向轴面无光泽，边缘有锯齿，小鳞片达0.5-0.8×0.2-0.3mm。

Stem leaves petiolate, petioles ca. 10 cm; sheaths broadly ovate, 2.5–4 cm, purple-red adaxially, densely white-setose abaxially; blades triangular-oblong, 10–15 × 5–7 cm, 3-pinnate; pinnae 5–7 pairs, only basal pinnae short-petiolulate; ultimate segments obovate or oblanceolate, 3–5 × 2–3 mm, setose along nerves abaxially, entire or 2–3 toothed, cuspidate at apex.

茎生叶具叶柄，叶柄约厘米；鞘宽卵形，正面2.5 -4厘米，紫红色，密被白色具刚毛；叶片三角形的长圆形， 10-15 * 5-7 厘米，3回羽状；羽片5-7 对，只是基本的羽片短的小叶柄；末回裂片倒卵形或倒披针形， 3-5 * 2-3 毫米，具刚毛沿着叶脉背面，全缘或齿状，骤尖在先端。

Flowers white, creamy-white, or purplish, large, 2-2.5 cm in diam., fragrant; pedicels usually purplish, nitid, subequaling or exceeding leaves at anthesis, glabrous, 2-bracteolate above middle; bracteoles linear or linear-lanceolate, margin very remotely and minutely denticulate.

花白色，乳白色，或者略带紫色，大，直径的2-2.5厘米，芳香；花梗通常略带紫色，有光泽的，近相等或者超过叶在花期，无毛，中部以上有2个小苞片；小苞片线或者线状披针形，边缘很稀疏和细的具小齿。

The conspicuous calyx teeth, well-developed bracts and bracteoles, and almost always pubescent fruit seem to distinguish it from Seseli , but more material is needed for a taxonomic study to resolve this complex situation.

明显的萼齿，发育良好苞片和小苞片，和几乎总是具短柔毛的果似乎可以明显地与Seseli的种区分开，但更多的标本仍需要采集用于分类研究以解决这个复杂的情况。

Sessile spikelet 3.5–4.5 mm, pallid; callus hairs 1/8 spikelet length; lower glume oblong-lanceolate, membranous, back slightly concave, villous except near apex, veinless between keels, upper keels smooth or pectinate-scabrid, apex narrowly truncate or 2-toothed; upper glume apex with 2–2.5 mm awn; upper lemma narrow, 2-toothed in upper 1/4; awn ca.

无梗小穗3.5-4.5毫米，灰白色；胼胝体毛1/8的小穗长度；长圆状披针形的下部的颖片，膜质，背稍凹，除近先端之外的具长柔毛，上面颖片先端具2-2.5毫米芒；在上面1/4里狭窄，2齿状的上面外稃；芒约1厘米，柱子具短缘毛。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐