Monday, 27 May 2024

Prunus cerasifera 櫻桃李

Common name: Cherry Plum, Myrobalan
Scientific name: Prunus cerasifera 櫻桃李
Genus:  Prunus 李屬
Family: Rosaceae 薔薇科, rose family

Origin:  Neophyte (established after 1500 AD). It is a native of south-eastern Europe (Balkan Penninsula), south-western and central Asia. It was known in cultivation by 1597 and was not recorded until the 20th century.

Date:  4th March (flowering) & 24th April (fruiting)

010 Sometimes thorny, deciduous shrub or small tree, can grow up to 8m.

015 Flowers appearing with leaves (vs flowers appear before leaves in Prunus spinosa 黑刺李, 刺李, blackthorn).

007 Young twig with flower buds.

009


009_1 Note the green (or reddish), shiny and glabrous 1st year twig (vs brown, more or less hairy new growth twig of  Prunus spinosa 黑刺李, 刺李, blackthorn) and the persistent bud scales (B Se) at base of the flower buds. Sepals (Sl).


011 Flower usually solitary.

006 Side view showing the brown bud scale at the base of the flower, the reflexed  green sepals and the white petals.

005 5 sepals.

005_1 Reflexed blunt, tongue-shaped, serrated sepals. (vs patent, triangular, entire or sparsely toothed sepals in Prunus spinosa 黑刺李, 刺李, blackthorn)

008_1 5 petals, numerous stamens and 1 pistil.

002_1 A fresh flower. Petals 7-11mm.

013_1 Petals had dropped, leaving the green reflexed sepals, numerous stamens and the pistil at the center.

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The following photos were taken on 24th April of the same plant:

034 The tree trunk.

033 More leaves and fruits are forming now.

032 The arrangement of the leaves on the twig.

028

028_1 

025_1

024


027_1 Leaf 3-7cm, glabrous, rather glossy above.

030_1 Underside of the leaf.

021

021_1 Fruit 2-2.5cm, (yellow or reddish when ripe) smooth.


023_1

Saturday, 4 May 2024

Malus domestica 蘋果

Common name: Apple
Scientific name: Malus domestica 蘋果
Genus:  Malus 蘋果屬
Family: Rosaceae 薔薇科, rose family
Origin: Archaeophyte (established before 1500 AD). 

Date:  24th & 28th April

260 Tree trunk showing the bark.

261 Upper branches.

252 Cluster of leaves.

252_1 Enlarged view showing the pubescent petioles and underside of the leaves. (vs glabrous mature leaf of the native Malus sylvestris 歐洲野蘋果, crab apple)

255 Upper side of the ovate leaf.

248_2 Pubescent mid and side veins of the upper side of the leaf. (vs glabrous mature leaf of the native Malus sylvestris 歐洲野蘋果, crab apple)

244

244_2 Pubescent mid and side veins of the underside of the leaf. (vs glabrous mature leaf of the native Malus sylvestris 歐洲野蘋果, crab apple)

256 Flowering twig.

257 Flowering twig.

240 Flower buds.

243

243_1 Side view of the flower buds showing the pubescent pedicels and outer side of the sepals. (vs glabrous pedicels and outer side of the sepals of the native Malus sylvestris 歐洲野蘋果, crab apple)

246_1 Note the pubescent outer side of the sepals. (vs glabrous outer side of the sepals of the native Malus sylvestris 歐洲野蘋果, crab apple)

288_1 5 pale pinkish-white petals, 5 sepals. (taken on 28th April at another location)

294_1 (taken on 28th April at another location)

241_2 Numerous stamens and style with 5 stigmas.

251_1 5 stigmas.

294_2 (taken on 28th April at another location)

Friday, 3 May 2024

Prunus padus 稠李、臭耳子、臭李子

Common name: Bird Cherry
Scientific name: Prunus padus 稠李*、臭耳子、臭李子
Genus:  Prunus 李屬
Family: Rosaceae 薔薇科, rose family
Origin: native

Remarks: '稠' is pronounced as '酬' in Cantonese

Date:  24th April

322 Deciduous, suckering (根出條) tree, can grow up to 19m.

201 Side branch.

200 Upper trunk.

198 Bark brown, peeling(?), strong smelling.

187 Leaves 5-10cm, glabrous.

193 Leaf axil. Leaves alternate.

186 Leaf obovate to elliptic, margin with fine sharp teeth, tip abruptly pointed.

192 Cordate leaf base.

192_1 Note the pair of glands at the end of the petiole.

194 Underside of the leaf, note the tufts of hairs in axils of main veins. (vs with rows of hairs along lower side midrib when mature in Prunus serotina 晚花稠李, rum cherry)

194_1 Tufts of hairs in axils of main veins.

196 Flowers in long (many-flowered elongated), more or less erect or drooping racemes. (vs inflorescence more closely packed in Prunus serotina 晚花稠李, rum cherry)

152 Pedicels 8-15mm. (vs pedicles 3-7mm in Prunus serotina 晚花稠李, rum cherry)

184 A raceme.

180

180_1 Flower bud, note the margins of the sepals.

182 Underside of the flower.

174_2 5 petals, many stamens and 1 carpel with 1 stigma. Petals 5-9mm. (vs petals 3-4.5mm in Prunus serotina 晚花稠李, rum cherry)

174_1