Ammoselinum popei
References
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Ammoselinum

 Taxa treated:
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by Lars Fröberg
(6a, 20080314)

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Ammoselinum Torr. & A. Gray      

Torrey & A. Gray, Pacif. Railr. Rep. Parke, Bot. 2: 165 (1856).

Ammoselinum popei Torr. & A. Gray 1856. F kääpiöputki. – Lit.: Lundell (1961; ill.), Suominen (1979). – Small therophyte. Leaves ternately or pinnately divided with linear lobes. Umbels almost sessile to shortly pedunculate; rays slightly papillose. Umbellules usually 3, with 2–4 bractlets. Flowers 3–4 per umbellule. Fruit elliptic to narrowly ovate in outline, 3.5 mm (unripe), with papillose ridges.
F U Helsinki 1931 (Jätkäsaari, probably brought in with wheat from USA). – C North America. – Map (not in the book).

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Lundell, C.L. 1961: Flora of Texas. – Renner, Texas.
Suominen, J. 1979: The grain immigrant flora of Finland. – Acta Bot. Fenn. 111.

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