Helminthotheca echioides 剛毛牛舌菊, 剛毛牛舌苣

Common name: Bristly Oxtongue
Scientific name: Helminthotheca echioides 剛毛牛舌菊, 剛毛牛舌苣
Genus: Helminthotheca 牛舌菊屬, 牛舌苣屬
Family: Asteraceae or Compositae 菊科, aster , daisy, composite or sunflower family

Origin: Archaeophyte (established before 1500 AD.) It has a European Southern-temperate distribution.

Date:  

a tall plant, can reach up to 90 cm

hairs with barbs on the stem

stem leaf sessile, more or less cordate and clasping; coarsely toothed

outer involucral bracts broad and leaf-like

forming fruits

Senecio vulgaris 歐洲千里光

Common name: Groundsel
Scientific name: Senecio vulgaris 歐洲千里光
Genus: Senecio 千里光屬
Family: Asteraceae or Compositae 菊科, aster , daisy, composite or sunflower family

Origin: native

Date:  21st Sept

leaf pinnately lobed

leaf deeply lobed more than halfway to midrib

glandular hairs absent; outer involucral bracts of flowering head black-tipped

heads 4-5 mm, ray florets usually absent

flowering heads split open naturally? but individually florets could be seen

achenes

Sisymbrium officinale 鑽果大蒜芥

Common name: Hedge Mustard
Scientific name: Sisymbrium officinale 鑽果大蒜芥
Genus: Sisymbrium 大蒜芥屬
Family: Brassicaceae or Cruiferae 十字花科, mustards, crucifers or cabbage family

Origin: Archaeophyte (established before 1500 AD.) It has a European Southern-temperate distribution.

Date:  1st July

basal leaves in a rosette, deeply divided

fruits appressed to stem

Fallopia baldschuanica 木藤首烏, 布哈拉何首烏, 巴爾朱旺虎杖, 巴爾德楚藤蓼, 俄羅斯藤蔓

Common name: Russian-vine
Scientific name: Fallopia baldschuanica 木藤首烏, 布哈拉何首烏, 巴爾朱旺虎杖, 巴爾德楚藤蓼, 俄羅斯藤蔓
Genus: Fallopia 何首烏屬
Family: Polygonaceae 蓼科, knotweed or smartweed-buckwheat family

Origin: Neophyte (established after 1500 AD.) It is a native of C. Asia. It was introduced in about 1894 and was first recorded in the wild in 1936.

Date: 29th Aug

inflorescence richly branched

5 tepals

flower

fruits

Trifolium medium 中間車軸草

Common name: Zigzag Clover
Scientific name: Trifolium medium 中間車軸草
Genus: Trifolium 三葉草屬
Family: Fabaceae 豆科, legume, pea or bean family

Origin: native

Date: 18th July

stipule with green veins; free part of stipule awl-shaped

leaflets may have an acuminate tip

the leaflet veins meet the edge of the the leaflet at about 90 degrees half-way along the leaflet