Common name: Marsh Cudweed
Scientific name: Gnaphalium uliginosum 濕生鼠麴草、濕鼠麴草、貝加爾鼠麴草、天山鼠麴草、東北鼠麴草
Genus: Gnaphalium 鼠麴草屬
Family: Asteraceae or Compositae 菊科, aster , daisy, composite or sunflower family
Remarks*:
Origin:
Date: 7th Sept
[001]
[015] A much-branched decumbent 横卧匍匐的 to erect annual, to 20 cm.
[005] Stem.
[005_2] Stem densely covered by woolly hairs.
[007_2]
[008] Leaves at the stem.
[008_1] Underside of the leaf.
[008_2] Also covered by woolly hairs.
[012_1] Lateral view of the flowering head.
[012_2] Also covered by woolly hairs.
[002_1] Flower heads in tight globose 球狀的 terminal clusters,
[003_1] Dense, sessile, terminal clusters, 3-10 flower heads per cluster, overtopped by apical (upper) leaves.
[004_1] Lateral view of the cluster of the flower heads at the top of the plant.
[006_1] A very young flower head in lateral branch.
[006_2] A very young flower head.
[003_2] Lateral view of a sessile flower head.
[011_2] A young flower head, ready to bloom.
[014_1] Another young flower head, ready to bloom.
[004_2] Outer involucral bracts (Oib) brown. (Note the outer involucral bracts of young flower heads are green) Woolly at base only.
The differences between Gnaphalium 鼠麴草屬 and Filago 絮菊屬 (both are called cudweeds 鼠麴草) are as follows:
Gnaphalium ----- Outer involucral bracts thin, dry, brownish; glabrous or woolly at base only;
Filago -----Outer involucral bracts soft, greenish; more or less wooly almost to top.
[010_2] The flower head in the middle of the above photo became fruits and was split open already.