討論:椬梧

山羊百科，林文智老師的植物、山岳、攝影紀錄

5. Elaeagnus oldhamii Maxim. 椬梧

Evergreen shrubs or small trees; young branches and buds covered with silvery scales. Leaves chartaceous, obovate, 3-6 cm long, 1.3-2.5 cm wide, obtuse, rounded or emarginate at the apex, acute at the base, the scales mostly silvery, the lateral veins 4-6 pairs; petioles 3-5 mm long. Inflorescence umbellate racemose; flowers white, pedicelled, 1-3 in a fascicle at the axillary of leaves on the long branches and of bracteoles on the short branches; pedicels 3-4 mm long; perianth tube cupulate, the lobes 2.5-3.5 mm long; stamens 4, the anthers long elliptic, 2.5-2.7 mm long, the filaments about 0.7 mm long; style 0.7-0.9 mm long, with stellate hairs. Fruit globose or nearly so, 7-9 mm long, red; seed 7-8 mm long.

In Fuchien and Kuantung of Mainland China. In the open area throughout of this island below the altitude 500 meters.

TAIIPEI: Tanshui, Kawakami & Sasaki s. n. ILAN: Suao, Saasaki s. n. HSINCHU: Kantinliao, Kawakami s. n. MIAOLI: Hoyenshan, Lu s. n. TAITUNG: Haituan, Lu 24017. HUALIEN: Chungte, Lu 13743.

5. Elaeagnus obovata Li in Lloydia 15: 157. 1952, Woody Fl. Taiwan 621. 1963. 小葉胡頹子

A shrub, more or less spiny; branchlets grayish, silvery-lepidote when young. Leaves thin-chartaceous, obovate, 3-4 cm long, 1.4—1.8 cm broad, acute, attenuate at base, entire, silvery scaly at first, soon glabrous and becoming very dark, dull, densely appressed silvery lepidote beneath, without brown dots, the midrib impressed above, raised beneath, the lateral veins about 5 per side, indistinct above, slightly raised beneath, the reticulations obsolete; petioles 3-4 mm long, sulcate, silvery lepidote. Fruit 2-4-fasciculate, axillary, ellipsoid, 7-8 mm long, about 2 mm thick, more or less ribbed, densely silvery lepidote; pedicels 3—4 mm long, silvery lepidote.

Endemic. Known from a single collection in northern Taiwan.

TAIPEI: Hibino & Ko s. n. in 1938.

This species is distinctly characterized by the small obovate leaves, which are very dark above and silvery-white beneath, without the presence of any brown spots. The obovate leaves are readily distinguished from those of the common and widespread E. oldhamii, as they are thin, acute at apex, strongly discolored on the two surfaces, and without brown spots.

福建胡颓子 Elaeagnus oldhami Maxim.

常绿直立灌木，高1-2米，具刺，刺粗壮，长10-40毫米或更长，基部着生花和叶；当年生枝密被褐色或锈色鳞片，一年生枝灰色或灰黄色，多年生枝鳞片脱落，黑色。叶近革质，倒卵形或倒卵状披针形，长3-4.5厘米，宽1.5-2.5厘米，顶端圆形，稀钝圆形，向基部渐窄狭，急尖或楔形，全缘，上面幼时密被银白色鳞片，成熟后脱落或部分脱落，微具光泽，干燥后褐黄色，下面密被银白色和散生少数深褐色鳞片，侧脉4-5对，两面略明显；叶柄褐色，长4-7毫米。花淡白色，被鳞片，数花簇生于叶腋极短小枝上成短总状花序；花梗长3-4毫米；萼筒短，杯状，长约2毫米，在裂片下面略收缩，子房上先膨大后收缩，裂片三角形，与萼筒等长或更长，达3毫米，顶端钝形，内面无毛或疏生白色星状柔毛，包围子房的萼管卵形，长约1毫米；雄蕊的花丝极短，花药矩圆形，长1.5毫米，达裂片的1/2以上；花柱直立，无毛。果实卵圆形，长5-8毫米，幼时密被银白色鳞片，成熟时红色，萼筒常宿存；果梗在花后不伸长。花期11-12月，果期次年2-3月。

产台湾、福建、广东，生于海拔500米以下的空旷地区。模式标本采自我国台湾。 本种的叶片倒卵形或倒卵状披针形；花较小，裂片与萼筒等长或更长，容易认识。其果实与牛奶子E. umbellata Thunb.相似，但本种为常绿灌木；叶片革质，顶端通常圆形；萼筒短，杯状，长2毫米而不同。

倒卵叶胡颓子Elaeagnus obovata Li in Lloydia 15 (3): 157. 1952.

灌木，多少具刺，枝灰色，幼枝具银白色鳞片；叶膜纸质，倒卵形，长3-4厘米，宽1.4-18厘米，顶端急尖，基部渐狭窄，全缘，上面幼时具银色鳞片，成熟后脱落，发亮，带黑色。下面密贴银白色和少数褐色鳞片，中脉在上面凹下，下面明显凸起，侧脉5对，上面略明显，下面微凸起，网状脉不明显；叶柄长3-4毫米，上面有沟槽，具银白色鳞片；花未见；2-4个果实簇生于叶腋，椭圆形，长7-8毫米，直径3毫米，略具肋纹，密生银白色鳞片；果梗长3-4毫米，具银白色鳞片。”

产我国台湾的台北。 未见标本和照片。李惠林发表本种时认为此种与福建胡颓子E. oldhamii Maxim.相近。根据仅有的果枝标本记载看来，很可能是福建胡颓子的同物异名，但还有待进一步的研究。