栏目

等苞紫菀Aster homochlamydeus Hand.-Mazz.

等苞紫菀Aster homochlamydeus Hand.-Mazz.

科名:菊科 Compositae

属名:紫菀属 Aster

《中国植物志》第74卷171页
  25. 等苞紫菀 图版46:5-8
  Aster homochlamydeus Hand. -Mazz., Symb. Sin. 7: 1901, 1936; S. Y. Hu in Quart. Journ. Taiw, Mus. 18: 288. 1965. ——Aster trinervius D. Don var. grossedentatus Franch. ex Diels in Not, Roy. Bot, Gard, Edinb. 7: 138, 166, 1912. nom, seminud. ——Aster homolepis Chang in Sched.
  多年生草本,根状茎长。茎直立,高20-50厘米,细,丛生或单生,下部被开展的短毛,后常脱毛,上部被密伏毛,不分枝或上部有屈折的分枝,下部有密集的叶。基部叶在花期枯萎,稀生存,与下部叶同形,叶片卵圆形,长2-7厘米,宽1-4.5厘米,急狭成长3-10厘米而具狭翅的柄,上部有疏齿,顶端钝;中部卵圆或长圆状披针形,长6-15厘米,宽2-4厘米,中部或下部急狭成楔形的短柄,上部有疏齿,顶端渐尖;上部叶小,无柄;全部叶常薄质,上面被短糙毛,下面被短伏毛,且沿脉及边缘有稍长的毛,中脉及约4对侧脉在下面稍凸起。头状花序径2-3厘米,2至十余个排列成伞房状,花序梗细,长1-7厘米。总苞倒锥形,长5-8毫米,径5-10毫米;总苞片2-3层,常等长,线状披针形,顶端尖或渐尖,长达8毫米,宽1-1.5毫米,外层多少草质,被短柔毛,内层上部草质,边缘宽膜质,有缘毛。舌状花约十余个,管部长达2毫米,舌片白色或紫色,长10-15毫米,宽2-2.5毫米。管状花长4-5毫米,管部长1.5-2毫米,有毛,裂片长达2毫米。冠毛长4-5毫米,稍红色,有不等长的微糙毛。瘦果长圆形或倒卵圆形,长3-4毫米,褐色,两面常有肋,被短粗毛。花期4-8月,果期7-9月。
  产于云南西北部(中甸、丽江)、四川西南部(木里、雷波)及甘肃南部(漳县)。生于高山及亚高山杂木林中。海拔3000-3300米。
  与三脉紫菀 (A. ageratoides Turcz.) 接近,但此种的总苞片2-3层,顶端渐尖或尖,外层全部多少草质,植株较细弱,叶无明显的离基三出脉,中部叶有宽翅或楔形的柄,不难区别。此种的叶形及头状花序的大小有变异。有一变型:腺梗变型 (f. filipes Ling f. nov.) 茎极纤细,叶长圆披针形,中部叶长3-4.5厘米,宽0.7-1厘米,边缘有浅齿或近全缘;头状花序小,总苞长达5毫米,总苞片长4毫米,宽1毫米,瘦果较小。产于甘肃南部(西固)。海拔3300米。
形态特征:多年生草本,根状茎长。茎直立,高20一50厘米,细,丛生或单生,下部被开展的短毛,后常脱毛,上部被密伏毛,不分枝或上部有屈折的分枝,下部有密集的叶。基部叶在花期枯萎,稀生存,与下部叶同形,叶片卵圆形,长2—7厘米,宽l一4.5厘米,急狭成长3—10厘米而具狭翅的柄,上部有疏齿,顶端钝;中部卵圆或长圆状披针形,长6—15厘米,宽2—4厘米,中部或下部急狭成楔形的短柄,上部有疏齿,顶端渐尖;上部叶小,无柄;全部叶常薄质,上面被短糙毛,下面被短伏毛,且沿脉及边缘有稍长的毛,中脉及约4对侧脉在下面稍凸起。头状花序径2—3厘米,2至十余个排列成伞房状,花序梗细,长1—7厘米。总苞倒锥形,长5—8毫米,径5—10毫米;总苞片2—3层,常等长,线状披针形,顶端尖或渐尖,长达8毫米,宽1—1.5毫米,外层多少草质,被短柔毛,内层上部草质,边缘宽膜质,有缘毛。舌状花约十余个,管部长达2毫米,舌片白色或紫色,长10—15毫米,宽2—2.5毫米。管状花长4—5毫米,管部长1.5—2毫米,有毛,裂片长达2毫米。冠毛长4—5毫米,稍红色,有不等长的微糙毛。瘦果长圆形或倒卵圆形,长3—4毫米,褐色,两面常有肋,被短粗毛。花期4—8月,果期7—9月。
产地分布:产于云南西北部(中甸、丽江)、四川西南部(木里、雷波)及甘肃南部(漳县)。生于高山及亚高山杂木林中。海拔3000—3300米。
本种提示:与三脉紫菀(A.AgeratoidesTurcz.)接近,但此种的总苞片2—3层,顶端渐尖或尖,外层全部多少草质,植株较细弱,叶无明显的离基三出脉,中部叶有宽翅或楔形的柄,不难区别。此种的叶形及头状花序的大小有变异。有一变型;腺梗变型(f.FilipesLingf.Nov.)茎极纤细,叶长圆披针形,中部叶长3—4.5厘米,宽0.7—1厘米,边缘有浅齿或近全缘;头状花序小,总苞长达5毫米,总苞片长4毫米,宽1毫米,瘦果较小。产于甘肃南部(西固)。海拔3300米。
参考文献:AsterhomochlamydeusHand.·Mazz·,Symb.Sin.7:1901,1936;S.Y.HuinQuart.Journ.Taiw,Mus.18:288.1965.——AstertrinerviusD.Donvar.Orossedentatus;;Franeh.eXDielsinNot,Roy·Bot,Gard,Edinb.7:138,166,1912.Nom,seminud.---AsterhomolepisChanginSched.

《Flora of China》 Vol. 20-21 (2011)
Aster homochlamydeus  Handel-Mazzetti Symb. Sin. 7: 1091. 1936.
等苞紫菀   deng bao zi wan
Aster ageratoides Turczaninow var. grossedentatus (Thunberg ex Diels) Kitamura; A. trinervius Roxburgh ex D. Don var. grossedentatus Thunberg ex Diels (Sep 1912); A. trinervius var. grossedentatus Franchet ex Diels (Oct 1912).
Herbs, perennial, 20-50 cm tall, sometimes caespitose; rhizomes long, slender. Stems erect, simple, finely striate, sparsely to moderately strigillose proximally, minutely stipitate glandular below leaves. Leaves cauline, gradually reduced upward, abaxially pale green, adaxially green, abaxially glabrous, veins strigillose to scabridulous, adaxially densely scabridulous, both surfaces sparsely minutely stipitate glandular in pits, more so apically, margin ciliate, midvein prominent abaxially, apex acuminate, mucronate; lowest leaves withered by anthesis, narrowly winged petiolate (petiole 0.5-10 cm); blade ovate, 1-2.5 cm, base attenuate, margin coarsely serrate; lower to upper leaves narrowly to very broadly petiolate; blade ovate to lanceolate, 5-10 × 1.5-4 cm, base cuneate-rounded to rounded, sometimes auriculate, sometimes clasping, margin coarsely serrate; synflorescence leaves sessile, lanceolate, 2-7 × 0.5-2 cm, base cuneate to rounded, margin 1-5-serrate. Capitula 1-10 in terminal corymbiform synflorescences; peduncles 10-90 mm, strigillose; bracts lanceolate, entire. Involucres campanulate, 5-8 mm; phyllaries 2- or 3-seriate, subequal, often squarrose, oblanceolate, abaxially sparsely to moderately villous-strigillose, sparsely minutely stipitate glandular, leaflike and green distally, margin erose, sparsely ciliate, midvein more pronounced distally, ± translucent, apex acuminate, sometimes purplish, sparsely ciliate; outer phyllaries 6-8 × ca. 1.5 mm, margin narrowly scarious; inner phyllaries 5-9 × ca. 2 mm, base ± hardened, margin broadly scarious. Ray florets 10-14, white or purple, lamina 10-15 × 2-3 mm, glabrous, eglandular; disk florets yellow, 4-5 mm, tube base flared, tube and limb glabrous, eglandular, limb campanulate, ca. 3 mm, lobes spreading, narrowly triangular, ca. 2 mm, sparsely strigose apically, eglandular. Achenes mottled purple, oblong, slightly compressed, 4-5 mm, sparsely strigillose, more densely so distally, eglandular, 4-ribbed (± translucent). Pappus 3-seriate, ± reddish; outermost bristles few, slender, 0.4-0.8 mm; inner bristles 2.5-3 mm, acute; innermost bristles 3.5-4 mm, slightly clavate. Fl. Apr-Aug, fr. Jul-Sep.
● Alpine and subalpine mixed forests; 3000-3700 m. S Gansu, SW Sichuan, NW Yunnan.

TOP