All Floras      Advanced Search
FOC Vol. 8 Page 395 Login | eFloras Home | Help
FOC | Family List | FOC Vol. 8 | Saxifragaceae

18. Philadelphus Linnaeus, Sp. Pl. 1: 470. 1753.

山梅花属 shan mei hua shu

Huang Shumei (Hwang Shu-mei); Hideaki Ohba, Shinobu Akiyama

Shrubs erect, rarely climbing, rarely spinescent. Branchlets opposite. Leaves opposite, exstipulate, veins 3-5, basifugal, margin entire or serrate. Inflorescences racemose, paniculate, or cymose, rarely 1-flowered. Flowers fragrant. Calyx tube campanulate or turbinate, adnate to ovary; lobes 4(or 5). Petals 4(or 5), white, contorted. Stamens 13-90; filaments flat, free or basally connate; anthers ovoid or oblong, rarely globose. Ovary inferior or subinferior, 4(or 5)-loculed; placentation axile; ovules numerous, pendulous. Style (3 or)4(or 5)-lobed; stigmas clavate or spatulate. Fruit a capsule, 4(or 5)-valved, dehiscing by valves; epicarp papery; endocarp corky. Seeds numerous.

About 70 species: mainly in temperate regions of the N hemisphere; 22 species (17 endemic) in China.

1 Style slender; stigma mallet-shaped, rarely clavate, 1-1.5 mm, shorter and narrower than anthers; racemes usually 3-7(-14)-flowered, lowest ones l-3-flowered.   (2)
+ Style robust; stigma clavate, oar-shaped, or spatulate, subequaling or longer than anthers; racemes (5-)7-11(-30)-flowered, usually lowest ones (2-)4- or 5-flowered in cymes or panicles.   (12)
2 (1) Pedicel and calyx densely appressed white hairy.   (3)
+ Pedicel and calyx glabrous or sparsely hairy.   (5)
3 (2) Leaf blade abaxially glabrous or villous to glabrescent when young, apex acute; calyx densely erect villous   11 P. dasycalyx
+ Leaf blade abaxially hairy, apex abruptly acuminate; calyx densely appressed strigose.   (4)
4 (3) Anthers glabrous   9 P. incanus
+ Anthers setose   10 P. reevesianus
5 (2) Inflorescence rachis and calyx purple or dark brown; calyx obscurely veined, sometimes glaucous.   (6)
+ Inflorescence rachis and calyx yellowish green or yellowish brown when dry; calyx conspicuously veined, not glaucous.   (7)
6 (5) Calyx sparsely pubescent to glabrescent, tube urn-shaped   7 P. purpurascens
+ Calyx sparsely strigose, tube campanulate   8 P. kansuensis
7 (5) Style slightly divided, glabrous; disc glabrous.   (8)
+ Style divided for 1/2 its length or more, base hairy; disc glabrous or sometimes hairy.   (10)
8 (7) Calyx sparsely villous   3 P. tenuifolius
+ Calyx glabrous.   (9)
9 (8) Leaf blade glabrous on both surfaces or only abaxially hairy at vein axils; racemes 5-7-flowered, rachis 3-5 cm   1 P. pekinensis
+ Leaf blade strigose adaxially and villous abaxially at vein axils; racemes 3-5-flowered, rachis 2-2.5(-4) cm   2 P. brachybotrys
10 (7) Petals suborbicular, hairy near base abaxially   6 P. laxiflorus
+ Petals obovate or oblong-obovate, glabrous.   (11)
11 (10) Racemes 5-7-flowered; leaf blade elliptic-ovate or ovate   4 P. schrenkii
+ Racemes 9-14-flowered; leaf blade broadly ovate or broadly ovate-elliptic   5 P. tsianschanensis
12 (1) Leaf blade densely hairy abaxially.   (13)
+ Leaf blade hairy abaxially or only along veins.   (17)
13 (12) Calyx densely gray-yellow strigose   12 P. kunmingensis
+ Calyx glabrous or sparsely hairy, sometimes hairy only along angles of tube.   (14)
14 (13) Leaf blade caudate-acuminate at apex.   (15)
+ Leaf blade acute or acuminate at apex.   (16)
15 (14) Style apically divided for 1/3-2/3 its length; leaf blade margin remotely serrulate   13 P. tomentosus
+ Style entire or only slightly divided; leaf blade margin coarsely triangular serrate   14 P. lushuiensis
16 (14) Calyx tube 4-angled in cross section, pubescent along angles   16 P. tetragonus
+ Calyx tube not angled in cross section, glabrous   15 P. delavayi
17 (12) Calyx glabrous.   (18)
+ Calyx hairy.   (19)
18 (17) Leaf blade adaxially strigose; branchlets, inflorescence, and calyx yellow-brown or brown, not glaucous   21 P. zhejiangensis
+ Leaf blade adaxially glabrous or bristly; branchlets, inflorescence, and calyx purple, glaucous   22 P. calvescens
19 (17) Calyx lobes oblong-lanceolate, apex caudate, tail 2-3 mm; leaf blade membranous, base rounded or subcordate   17 P. caudatus
+ Calyx lobes ovate or ovate-lanceolate, apex acuminate or acute, acumen 1-1.5 mm; leaf blade papery, base cuneate or broadly so.   (20)
20 (19) Calyx tube golden yellow or grayish yellow villous; style hairy as calyx; leaf blade villous abaxially along veins   18 P. subcanus
+ Calyx tube white bristly or strigose; style glabrous, rarely hairy; leaf blade scabrid-hirsute abaxially along veins.   (21)
21 (20) Leaf blade ovate, ovate-oblong, or lanceolate   19 P. henryi
+ Leaf blade elliptic or elliptic-lanceolate, rarely ovate-elliptic   20 P. sericanthus

  • List of lower taxa


    Related Objects  
  • PDF File
  • PDF

  • Flora of China @
    Browse by
    Advanced Search

    Flora of China Home




     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |