Common name: Perennial Sow-thistle
Scientific name: Sonchus arvensis 苣蕒菜、苦菜、苦苣菜*
Genus: Sonchus 苦苣菜屬
Family: Asteraceae or Compositae 菊科, aster , daisy, composite or sunflower family
Remarks*: It is also recorded in HK.
Origin: native
Date: 16th July
239 A tall, erect, rhizomatous perennial, can reach up to 150cm.
243 Stem leaf sessile, with rounded auricles clasping the stem.
244 Rounded auricles clasping the stem.
242 Rounded auricles clasping the stem.
241 Rounded auricles with spiny teeth.
245 Basal leaves more or less pinnately lobed, lobes with spiny teeth (could not been seen above); stem leaf sessile, pinnate lanceolate, lobes with spiny teeth as well.
240
246 Spiny leaf margin.
247 Inflorescence branches densely covered by yellow glandular hairs.
247_1 Enlarged the photo above to show the yellow glandular hairs.
250 Unopened flower heads.
250_1 Unopened flower head showing the yellow glandular hairs on involucres.
249 Flower stalk and involural bracts are both densely covered by yellow glandular hairs.
251 Flower head 4-5cm across, deep yellow.
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