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40th Anniversary, CUHK
Flower talks
 
Student Project 4 : Botany on Pui O Beach
學 生 習 作 4 : 貝 澳 沙 灘 植 物 學

         
Pui O Beach is located in southern Lantau Island. It is a beautiful beach of about one kilometer long, with clear water and fine sand. With its beautiful scenery and rich flora, a field study on Pui O Beach can be very enjoyable.
Field Manual
183 KB
         
Pui O Beach is easily accessible by bus No. 3 and 3M at Tung Chung MTR Station or No. 1, 2, 3, 3M, 4, or 7P at Mui Wo ferry pier.

Sandy beaches represent a harsh habitat that is inhabited by plants adapted to such a habitat. The environmental stresses on plants include unstable substratum, poor water supply, tidal changes and waves washing ashore causing submersion in sea water or exposure to air, low nutrient supply, high intensity of sunlight, great daily fluctuation of temperature, salt sprays, and exposure to herbivores and trampling. Thus, sandy beaches are good examples to illustrate the adaptation of plants to xerophytic habitats in Hong Kong. In Project No. 4, we invite you to learn more about plants on sandy beaches and appreciate their adaptations to such a habitat.

         
Students are suggested to
         
  (a) (a) look for the plants that demonstrate certain features and adaptations,
  (b) (b) take a photo of the plant or plant parts concerned or a photo of the student standing next to or touching the plant (but not detaching or picking any plant part), and
  (c) (c) summarise the features or adaptations in short phrases or use them as captions for the photos. When finished, students can submit their reports and photos to < webmaster@hkflora.com > or send them to Hong Kong Flora and Vegetation Team, Department of Biology, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong. We shall arrange to have them loaded on the website.
         
Reports should include:
         
  a) School name
  b) Teacher and student names
  c) Date, and
  d) Report and photos
         
Here is a list of special features of plants on sandy beaches that could be covered (as much as possible) and students are welcome to add any other relevant topics:
         
  Find an example of
    (a) low lying, prostrate, or cushion-like habits,
    (b) dwarfed forms aboveground,
    (c) special root systems or underground stems,
    (d) small, often spiny, leaves
    (e) leathery or hairy leaves,
    (f) thick cuticle,
    (g) thorny stems,
    (h) succulent stems or leaves,
    (i) oil-dotted leaves,
    (j) plant bearing latex, and
    (k) fruits or seeds for water dispersal (e.g. Pandanus tectorius 露兜樹)
       
List of plant species commonly found on and around Hong Kong sandy beaches.
       
Family
Name
Scientific Name Chinese
Name
English
Name
Trees
Casuarinaceae Casuarina equisetifolia L. 木麻黃(牛尾松) Horsetail Tree
Tiliaceae Microcos paniculata L. 破布葉 (布渣葉) Microcos
Malvaceae Hibiscus tiliaceus L. 黃槿 Cuban Bast
Malvaceae Thespesia populnea (L.) Soland. ex Corrêa 恒春黃槿(繖楊) Portia Tree
Flacourtiaceae Scolopia chinensis (Lour.) Clos 刺柊 Chinese Scolopia
Euphorbiaceae Macaranga tanarius (L.) Muell. Arg. 血桐 Elephant's Ear
Apocynaceae Cerbera manghas L. 海杧果 Cerbera
Pandanaceae Pandanus tectorius Sol. 露兜樹 Screw Pine
Shrubs
Aizoaceae Tetragonia tetragonioides (Pall.) Kuntze 番杏 New Zealand Spinach
Chenopodiaceae Suaeda australis (R. Br. ) Moq. 南方鹼蓬 South Sea-Blite
Papilionaceae Sophora tomentosa L. 絨毛槐(海南豆樹) Hairy Sophora
Sapindaceae Dodonaea viscosa (L.) Jacq. 車桑子(坡柳) Clammy Hop Seed
Verbenaceae Clerodendrum inerme (L.) Gaertn. 苦郎樹(苦楮、假茉莉) -
Verbenaceae Vitex rotundifolia L. f. 單葉蔓荊(白背蔓荊) -
Goodeniaceae Scaevola hainanensis Hance 海南草海桐 Hainan Naupaka
Goodeniaceae Scaevola taccada (Gaertn.) Roxb. (Scaevola sericea Vahl) 草海桐 Beach Naupaka
Compositae Pluchea indica (L.) Less. 闊苞菊 Marsh Fleabane
Herbs
Aizoaceae Sesuvium portulacastrum (L.) L. 海馬齒(濱莧) Sea-purslane
Cactaceae Opuntia stricta (Haw.) (Haw.) var. dillenii (Ker-Gaw.) L. D. Benson 仙人掌 Prickly-pear
Chenopodiaceae Atriplex maximowicziana Makino 海濱藜 Saltbush
Molluginaceae Mollugo stricta L. 粟米草 Indian Chickweed
Caryophyllaceae Polycarpaea corymbosa (L.) Lam. 白鼓釘 Corymbose Polycarpaea
Plumbaginaceae Limonium sinense (Girard) Kuntze 補血草 Sea-Lavender
Papilionaceae Alysicarpus vaginalis (L.) DC. 鏈莢豆 Alyce Clover
Papilionaceae Crotalaria retusa L. 吊裙草 Retuse-leaved Crotalaria
Onagraceae Oenothera drummondii Hook. 海濱月見草 -
Compositae Gynura divaricata (L.) DC. 白子菜 -
Compositae Ixeris japonica (Burm. f.) Nakai 剪刀股 -
Compositae Wollastonia biflora (L.) DC. 雙頭菊 (孿花蟛蜞菊) -
Cyperaceae Carex pumila Thunb. 矮生薹草 Dwarf Sedge
Cyperaceae Cyperus rotundus L. 香附子 (香頭草) Nut-grass Galingale
Cyperaceae Cyperus stoloniferus Retz. 粗根莖莎草 Stolon-bearing Galingale
Cyperaceae Fimbristylis cymosa R. Br. 黑果飄拂草 Black-fruited Fimbristylis
Cyperaceae Fimbristylis sericea (Poir.) R. Br. 絹毛飄拂草 Sericeous Fimbristylis
Cyperaceae Mariscus javanicus (Houtt.) Merr. & F. P. Metcalt 羽穗磚子苗 Feathery Spike Sawgrass
Cyperaceae Mariscus radians (Nees & Meyen) Ts. Tang & F. T. Wang 輻射磚子苗 Radiate Sawgrass
Cyperaceae Remirea maritima Aubl. 海濱莎 Seashore Remirea
Amaryllidaceae Crinum asiaticum L. var. sinicum (Herb.) Baker 文殊蘭 Chinese Crinum
Creepers
Papilionaceae Canavalia lineata (Thunb.) DC. 狹刀豆 Narrow Sword Bean
Papilionaceae Canavalia maritima Thouars 海刀豆 Sea Sword Bean
Papilionaceae Vigna marina (Burm.) Merr. 濱豇豆 Marine Cowpea
Asclepiadaceae Cynanchum insulanum (Hance) Hemsl. 海南杯冠藤 Insular Swallow Wort
Asclepiadaceae Gymnanthera oblonga (Burm. f.) P. S. Green 海島藤 Oblong Gymnanthera
Convolvulaceae Ipomoea obscura (L.) Ker-Gawl. 小心葉薯 (紫心牽牛) -
Convolvulaceae Ipomoea pes-caprae (L.) Sweet 厚藤(海灘牽牛) Beach Morning-glory
Convolvulaceae Ipomoea stolonifera (Cyrillo) J. F. Gmel. 假厚藤( 厚葉牽牛) Thick-leaved Morning-glory
Compositae Ixeris repens (L.) A. Gray 苦蕒菜 -
Compositae Launaea sarmentosa (Willd.) Sch. Bip. ex Kuntze 匍莖栓果菊 -
Compositae Wedelia trilobata (L.) Hitchc. 三裂葉蟛蜞菊 -
Grasses
Gramineae Cenchrus echinatus L. 蒺藜草 Bur Grass
Gramineae Chloris formosana (Honda) Keng 臺灣虎尾草 Taiwan Chloris
Gramineae Digitaria heterantha (Hook. f.) Merr. 二型馬唐 -
Gramineae Panicum repens L. 鋪地黍 Panic Grass
Gramineae Paspalum paspaloides (Michx.) Scribn. 雙穗雀稗 Knotgrass
Gramineae Spinifex littoreus (Burm. f.) Merr. 鬣刺 Littoral Spinegrass
Gramineae Sporobolus virginicus (L.) Kunth 鹽地鼠尾粟 Seashore Dropgrass
Gramineae Thuarea involuta (G. Forst.) R. Br. ex Roem. 蒭雷草 -
Gramineae Zoysia matrella (L.) Merr. 溝葉結縷草 Manila Grass
Gramineae Zoysia sinica Hance 中華結縷草 Chinese Lawn Grass

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