Hypericum monogynum

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Hypericum monogynum

Description

Bushy shrub, ½-1.3 m, with spreading branches; branchlets 2(-4)-lined when young, eventually becoming terete. Leaves sessile or with petiole up to 1½ mm, 2-4½ by 1-1¾ cm, elliptic or oblong to oblanceolate, apex obtuse or minutely apiculate to rounded, base cuneate to rounded or subcordate paler below; 4-6 main lateral veins, with intramarginal vein and conspicuous dense reticulate venation; glands all pale, punctate. Inflorescence 1-c. 15-flowered, terminal (1-3 nodes), corymbose. Flowers 3-5 cm ø, plane or convex; buds ovoid, subacute to acute. Sepals 4½-10 by 1½-3 mm, free, imbricate, narrowly elliptic or narrowly oblong to lanceolate, acute or more rarely obtuse to rounded, entire, midrib invisible or almost so; spreading or ascending in flower and fruit; glands all pale, linear. Petals golden-yellow to lemon-yellow, 2-3 by 1½-1½ cm, obovate, entire, caducous; apiculus variable, acute to rounded or absent; glands all pale, linear. Stamen fascicles 5, 18-28 mm long, almost equalling petals, each with 25-35 stamens, caducous; anthers bright yellow, gland amber. Ovary 2½-4 mm, broadly ovoid to subglobose; styles 5, 12-18 mm, c. 3½-5 times as long as the ovary, united almost to the apex; stigma small; placentas 5, axile. Capsule 6-10 mm, broadly ovoid or ovoid-conic to subglobose. Seeds dark reddish-brown, cylindric, curved, narrowly carinate, shallowly linear-reticulate to linear-foveolate.

Distribution

Asia-Temperate:, Taiwan (Taiwanpresent) Asia-Tropical:, Jawa (Jawa); Sulawesi (Sulawesi) England: SE. China: present
SE. China, Taiwan. Introduced to England in 1753 and now cultivated in many parts of the world, including Java and Celebes.

Notes

The plant cultivated in Malesia, to which the above synonymy and description refer, is the type form, with smaller, obtuse to rounded leaves and smaller flowers, which is native to Kwangtung and adjacent parts of China. The plant with larger, acute leaves and larger, more numerous flowers, known as H. salicifolium SIEB. & ZUCC., H. chinense var. salicifolium (SIEB. & ZUCC.) CHOISY, H. chinense subsp. salicifolium (SIEB. & ZUCC.) O.K., etc., appears to intergrade with the typical one in China, so that segregation, even as a variety, is not possible.
Unfortunately the epithet chinense cannot be maintained.

Citation

KIMURA - in Nakai & Honda, Nova Fl. Jap. 10. 1951: 103
SPACH - in Ann. Sc. Nat. 1836: 364
FORB. & HEMSL. - in J. Linn. Soc. Bot. 1886: 72
CHOISY, Prod. Monogr. Hyper. 1821: 40
Bl. - in Mus. Bot. Lugd. Bat. 1856: 22
MILL., Gard. Dict., ed. 8. 1768: no 11
HAND.-MAZZ. - in Symb. Sin. 1931: 401
ROBSON - in J. R. Hort. Soc. 1970: 489
BACK., Schoolfl. Java. 1911: 87
MIQ. - in Fl. Ind. Bat. 1859: 514
CURTIS - in Bot. Mag. 1796: t. 334
Bl. - in Bijdr. 1825: 141
KELLER - in E. & P., Nat. Pfl. Fam., ed. 2, 21. 1925: 176
BACK. & BAKH. f. - in Fl. Java. 1963: 382
LINNÉ - in Amoen. Acad. 1785: 323
LINNÉ, Pl. Jav. 1858: 5
HAYATA - in IC. Pl Formos. 1911: 78
HASSK., Pl. Jav. Rar. 1848: 278
LINNÉ - in DC., Prod. 1. 1824: 545
LINNÉ - in Zoll., Syst. Verz. 1854: 150