Phyllagathis hirsuta

• Interesting Facts
• Description
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Interesting Facts

Description

Family Melastomataceae

Herbs, shrubs , or trees (to 20 m tall), erect , climbing , or rarely epiphytic. Stipules lacking. Leaves simple , commonly opposite and decussate with one of a pair slightly smaller than other, rarely verticillate or alternate by abortion of one of a pair, usually 1-4(or 5) secondary veins on each side of midvein , originating at or near base and anastomosing apically, tertiary veins numerous, parallel, and connecting secondary veins and midvein but in Memecylon secondary veins pinnate and tertiary veins reticulate . Inflorescences cymose , umbellate , corymbose , in paniculate clusters , or a cincinnus, rarely flowers single, fascicled, or born on a spike; bracts sometimes conspicuous and persistent . Flowers bisexual , actinomorphic but androecium often slightly zygomorphic, usually (3 or) 4- or 5(or 6) -merous, perianth biseriate , perigynous; bracteoles opposite, usually caducous . Hypanthium funnel-shaped, campanulate , cyathiform , or urceolate . Calyx lobes (3-) 5(or 6), valvate (rarely connate , but not in Chinese species) . Petals (3-) 5(or 6), equal to number of sepals, distinct , imbricate. Stamens usually twice as many as petals and in 2 whorls, rarely as many as petals by loss of 1 whorl, isomorphic or dimorphic ; filaments distinct, often geniculate , inflexed in bud; anthers typically 2-celled, introrse , basifixed , dehiscent by 1 or 2 apical pores or by short longitudinal slits (Astronia, Memecylon) ; connective often variously appendaged. Pistil and style 1; stigma minute, capitate or truncate . Ovary commonly inferior or semi-inferior, locules usually (3 or) 4 or 5(or 6) with numerous anatropous ovules , rarely 1-loculed and ovules ca. 9 (Memecylon) ; placentation axillary , parietal (Astronia and, outside China, Pternandra Jack ), or free central (Memecylon) . Fruit a dry or fleshy capsule or a berry, loculicidally dehiscent or indehiscent. Seeds (when 3-6-loculed) usually small, curved through half a circle (cochleate) or wedge-shaped (cuneate), in Memecylon seeds large and ovoid ; endosperm absent.

Between 156 and 166 genera (150-160 in Melastomataceae sensu stricto and six in Memecylaceae here considered part of Melastomataceae) and ca. 4500 species (ca. 4050 in Melastomataceae sensu stricto and 450 in Memecylaceae [Olisbeoideae if considered a subfamily of Melastomataceae]) : primarily in tropical and subtropical regions; 21 genera (five endemic) and 114 species (72 endemic) in China.

Chinese genera of economic value include Osbeckia (medicine) and Melastoma (wild fruit and ornamental flowers) .[1]

Genus Phyllagathis

Herbs, shrublets , or shrubs , erect or stoloniferous . Stems usually 4-sided. Leaves petiolate ; leaf blade secondary veins 2-4 on each side of midvein , tertiary veins parallel, margin entire or denticulate . Inflorescences terminal , subterminal , or axillary , umbellate , cymose umbellate, cymose paniculate, or rarely capitate, usually long pedunculate ; bracts caducous . Flowers (3 or) 4-merous. Pedicel bracteolate . Hypanthium funnel-shaped or subcampanulate, (3 or) 4-sided, longitudinal (6 or) 8-ribbed. Calyx lobes (3 or) 4. Petals ovate , obovate , or broadly ovate, usually oblique . Stamen whorls equal in shape and length or only slightly unequal in length; anthers subulate to oblong-linear, base tuberculate , expanded, or not appendaged; connective decurrent, forming a short spur. Ovary inferior, urceolate , rarely cup-shaped, (3 or) 4-celled. Style filiform ; stigma acute. Capsule cup-shaped or globose-urceolate; hypanthium 8-ribbed. Seeds small, cuneate, angulate , densely tuberculate or not.

About 56 species: China, Indonesia, Malaysia, Myanmar, Thailand; 24 species (19 endemic) in China.

Although the genus has recently been revised (Hansen, Bull . Mus. Natl. Hist. Nat., B , Adansonia 14: 355-428. 1993 ["1992"]), the Chinese species are poorly collected and understood.[2]

Taxonomy

Similar Species

Members of the genus Phyllagathis

ZipcodeZoo has pages for 1 species, subspecies, varieties, forms, and cultivars in this genus:

P. rotundifolia (Tapak Sulaiman)

More Info

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Further Reading

• A bibliographic enumeration of Bornean plants, by E. D. Merrill. Singapore, Printed by Fraser & Neave, ltd., 1921 url p. 440, p. 440.
• Botanical publications of E.D. Merrill. [New York, etc., 1899- url p. 440.
• The Sarawak Museum journal. [Kuching]: Sarawak Museum, [1911- url .
• Chen Cheih. 1984. Melastomataceae. In: Chen Cheih, ed., Fl. Reipubl. Popularis Sin. 53(1): 135-293.
• Chen Cheih. 1984. Melastomataceae. In: Chen Cheih, ed., Fl. Reipubl. Popularis Sin. 53(1): 135-293.

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 16, 2012.

Identifiers

• Biodiversity Heritage Library NamebankID: 10714063
• Global Biodiversity Information Facility Taxonkey: 15618760
• Globally Unique Identifier: urn:lsid:ipni.org:names:574709-1
• Zipcode Zoo Species Identifier: 3547096

Footnotes

1. Jie Chen & Susanne S. Renner "Melastomataceae". in Flora of China Vol. 13 Page 360. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
2. Jie Chen & Susanne S. Renner "Phyllagathis". in Flora of China Vol. 13 Page 361, 377, 388. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]

©2004-2012 David Stang. All rights reserved.