《中国植物志》|| 樟科 LAURACEAE ||肉桂组 Sect. Cinnamomum ||聚花桂 Cinnamomum contractum H. W. Li
37.聚花桂 柴桂（云南禄劝），桂树（西藏波密）图版56:7-12
Cinnamomum contractum H. W. Li in Act. Phytotax. Sin. 16 (2) ; 91, Pl. 7, f. 3. 1978. ——C. loureiri auct. non Nees; Lec. in Nouv. Arch. Mus. Hist. Nat. Paris, 5e Ser, 5; 80. 1913. ——C. wilsonii auct. non Gamble: Edinb. Staff in Not. Bot. Gard. Edinb. 17; 131. 1929, 231, 404. 1930.
小乔木，高达8米，胸径32厘米；树皮灰黑色，光滑，有桂醛的芳香气。老枝圆柱形，粗壮，干时茶褐色或红褐色，有多数皮孔，无毛，幼枝具细条纹，无毛。叶互生或近对生，卵形至宽卵形，长9-14厘米，宽3.5-7.5厘米，先端渐尖，尖头钝，基部宽楔形至近圆形，革质，边缘软骨质，内卷，上面绿色，光亮，无毛，下面灰绿色，晦暗，幼时明显被白色丝状短柔毛，最后变无毛，离基三出脉，中脉与侧脉在上面明显下面凸起，干时均呈淡黄色，中脉直贯叶端，侧脉近对生，自离叶基5-10毫米处生出，向上弧曲，至叶端渐消失，外侧有时无支脉，有时具3-5条支脉，支脉弧曲，在叶缘之内连结，横脉多数，弧曲，纤细，下面多少明显；叶柄长1-2厘米，腹平背凸，无毛。圆锥花序腋生及顶生，密集多花，腋生者长4-8.5厘米，下部具短分枝或近总状，顶生者伸长，长达12厘米，分枝几自序轴基部生出，最下部分枝长达4厘米，向上分枝渐缩短，为具短梗或无梗的2-11花的伞形花序所组成；总梗极短，长5-15毫米，与各级序轴密被灰色细微柔毛。花黄绿色，长达7毫米；花梗短，长2-4毫米，密被灰色细微柔毛。花被内外两面被丝状微柔毛，花被筒倒锥形，长约1.5毫米，花被裂片卵圆形或长圆状卵圆形，先端锐尖，长5毫米，外轮宽3.8毫米，内轮宽3毫米。能育雄蕊9，花丝被柔毛，第一、二轮雄蕊长3.6毫米，花丝纤细，长达2毫米，无腺体，花药长圆状卵圆形，先端钝，长1.6毫米，药室4,内向，第三轮雄蕊长4毫米，花丝粗大，扁平，在中部稍上方有一对具短柄的肾形腺体，花药长圆形，长1.8毫米，药室4，外
向。退化雄蕊3，位于最内轮，三角状箭头形，连短柄长2.5毫米。子房卵珠形，长1.5
毫米，无毛，花柱粗大，长3.5毫米，柱头增大，头状。果未见。花期5月。
产云南西北部、西藏东南部。生于山坡或沟边的常绿阔叶林中，海拔1800-2800米。
本种与川桂Cinnamomum wilsonii Gamble十分相近，但圆锥花序多花密集，腋
生及顶生，腋生者短小，下部具短分枝或近总状，顶生者十分伸长，分枝向上渐缩短，为具
短梗或无梗的2-11花的伞形花序所组成；花黄绿色，花梗短，长2-4毫米，极易区别。
Source 中国植物物种信息数据库
《Flora of China》|| Lauraceae || Cinnamomum ||聚花桂 Cinnamomum contractum
40. Cinnamomum contractum H. W. Li, Acta Phytotax. Sin. 16(2): 91. 1978.
聚花桂 ju hua gui
Small trees, up to 8 m tall, to 32 cm d.b.h. Bark gray-black, smooth, with cinnamic aldehyde flavor. Old branchlets terete, robust, tea-brown or red-brown when dry, many lenticellate, glabrous, young ones striate, glabrous. Leaves alternate or subopposite; petiole 1-2 cm, plano-convex, glabrous; leaf blade gray-green and opaque abaxially, shiny green adaxially, ovate to broadly ovate, 9-14 × 3.5-7.5 cm, leathery, white sericeous-pubescent when young but eventually glabrate abaxially, glabrous adaxially, triplinerved, midrib extending to leaf apex, midrib and basal lateral veins elevated abaxially, conspicuous adaxially, all yellowish when dry, basal lateral veins subopposite, adaxially arising 5-10 mm from leaf base, arcuate, evanescent at leaf apex, sometimes with 3-5 additional veins outside, additional veins arcuate and interconnected within leaf margin, transverse veins numerous, arcuate, slender, ± conspicuous abaxially, base broadly cuneate to subrounded, margin cartilaginous and involute, apex acuminate, acumen obtuse. Panicles axillary and terminal, many flowered, composed of shortly pedunculate or sessile 2-11-flowered cymes, axillary ones 4-8.5 cm, shortly branched at lower part or subracemose, terminal ones elongate, up to 12 mm, branched almost from base and upward, lowest branches up to 4 cm, other branches gradually shorter upward; peduncles very short, 0.5-1.5 cm, peduncle and rachis densely finely gray puberulent. Pedicels short, 2-4 mm, densely finely gray puberulent. Flowers yellow-green, up to 7 mm. Perianth sericeous-puberulent outside and inside; perianth tube obconical, ca. 1.5 mm; perianth lobes ovate or oblong-ovate, acute, outer ones ca. 5 × 3.8 mm, inner ones ca. 5 × 3 mm. Fertile stamens 9, ca. 3.6 mm (of 1st and 2nd whorls) or ca. 4 mm (of 3rd whorl); filaments of 1st and 2nd whorls slender, up to 2 mm, glandless, those of 3rd whorl robust, complanate, each with 2 shortly stalked reniform glands; anthers of 1st and 2nd whorls oblong-ovate, ca. 1.6 mm, obtuse, each with 4 introrse cells, those of 3rd whorl oblong, ca. 1.8 mm, each with 4 extrorse cells. Staminodes 3, triangular-sagittate, including short stalk ca. 2.5 mm. Ovary ovoid, ca. 1.5 mm, glabrous; style robust, ca. 3.5 mm; stigma dilated, capitate. Fruit unknown. Fl. May.
● Evergreen broad-leaved forests on mountain slopes, valley sides; 1800-2800 m. SE Xizang, NW Yunnan.
Source eFloras.org
