Dissertation > Biological Sciences > Botany > The plant taxonomy (system botany )

Systematic Taxonomy of the Genus Osmanthus (Oleaceae)

Author JiChunFeng
Tutor XiangQiBai
School Nanjing Forestry University
Course Botany
Keywords Genus Osmanthus China Leaf surface micromorphology Types of finishing Geographic distribution The origin and evolution Economic value
CLC Q949
Type PhD thesis
Year 2004
Downloads 407
Quotes 7
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Since the genus Osmanthus establish since 1790, has published nearly 108 names (including subspecies classification). Morphological classification, the relevant records in the local flora, wood anatomy, molecular biology, palynology, physiological and biochemical aspects of a systematic review of the history and current status of the case of the study, carried out research in the following areas : 1. Based on access to large amounts of data, the system compares the Genus Osmanthus Osmanthus its allied Phillyrea, Linociera, Chionanthus, Forrestiera, Olea is the difference between clear the boundaries of this genus. Believe that P. S. Green (1958) identified the genus is divided into four groups within the genus classification system is reasonable. 2. Leaf micro-morphological studies carried out using a scanning electron microscope (SEM) for the first time for the genus Osmanthus, observed 15 species of leaf surface micromorphology Genus Osmanthus, results show that this is a plant stomata and glands are mainly distributed in the lower epidermis, epidermis no. The current rules of the plant stomata arranged neatly, often oval or circular, size between 11.9 × 16.7μ-27.5 × 32.5μ,. The outer stomatal epidermal cells often prominent in a circle, sometimes was a complex wound rope-like. In addition to the narrow-leaf Osmanthus O. attenuatus Mountain Osmanthus O. the delavayi outside, with a circular glands, glands, often with radial stripes. The use of a combination of both of stomata and glandular point characteristics of Osmanthus species group level to distinguish. Micromorphological study results are basically consistent with the traditional classification results. Prepared according to the findings of the micromorphological Osmanthus Key to Species. Micromorphology in the genus are discussed. 3. The first time starting from the fruit morphology of Osmanthus system classification for the preliminary study results showed that 11 species and one variety of fruit mignonette, the panicles group, this genus the luteolin group, tube flowers Osmanthus group, away from the flap Osmanthus group four group there are differences in the morphology and size of fruit, with some taxonomic significance. 4. The system discussed Osmanthus morphological characteristics, leaf margin, veins, inflorescence, corolla, stamens traits is the the genus Osmanthus classification of main traits. 5. Through access to a large number of specimens of the 13 major domestic Herbarium, combined with previous research data to confirm an existing 31 5 varieties Osmanthus, China, 26 species and 2 varieties found them O. minor 8 new distribution, merging the long tail Osmanthus Osmanthus caudatus H. T. Of Chang with small fruit mignonette O. armatus Diels vat. microcarpa J. L. Liu two taxa systematically found in the Herbarium around not officially released the group spent osmanthus O. glomerulata H. W. Li et al 18 names, and included in the appropriate categories as synonyms. 6. Specimen records, and information, lists detailed the genus Osmanthus distribution list of its distribution characteristics. 7. The study found that the sweet-scented osmanthus O. fragrans wild distribution in 11 provinces of Guangdong, Jiangxi, Hunan, Hubei, Anhui, Fujian, Guangxi, Yunnan, Zhejiang, Guizhou, Tibet within. 8. East Asia Osmanthus center of modern distribution centers and differentiation. Inferred from the existing distribution pattern, Osmanthus may have originated in East Asia to the tropical and subtropical regions of Southeast Asia, South China, to the Malay peninsula along the southwest. The existing four groups with panicles, racemes, clustered cyme inflorescence type, speculated cyme inflorescence evolution Tapered of inflorescence - Raceme - clustered order. 9. Discussed the economic value of Osmanthus landscaping, industrial, edible, medicinal.

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