Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

Wild Teasel

Dipsacus fullonum

Description:

The genus name is derived from the word for thirst and refers to the cup-like formation made where sessile leaves merge at the stem. Rain water can collect in this receptacle; this may perform the function of preventing sap-sucking insects such as aphids from climbing the stem. A recent experiment has shown that adding dead insects to these cups increases the seedset of teasels (but not their height), implying partial carnivory.[1] The leaf shape is lanceolate, 20–40 centimetres (7.9–16 in) long and 3–6 centimetres (1.2–2.4 in) broad, with a row of small spines on the underside of the midrib. Teasels are easily identified with their prickly stem and leaves, and the inflorescence of purple, dark pink or lavender flowers that form a head on the end of the stem(s). The inflorescence is ovoid, 4–10 centimetres (1.6–3.9 in) long and 3–5 centimetres (1.2–2.0 in) broad, with a basal whorl of spiny bracts. The first flowers begin opening in a belt around the middle of the spherical or oval flowerhead, and then open sequentially toward the top and bottom, forming two narrow belts as the flowering progresses. The dried head persists afterwards, with the small (4–6 millimetres (0.16–0.24 in)) seeds maturing in mid autumn.

1 Species ID Suggestions

VineWorld
VineWorld 8 years ago
Teasel spp.
Dipsacus spp.


Sign in to suggest organism ID

2 Comments

ElsiOuzts
ElsiOuzts 8 years ago

Thanks Vineworld!

ElsiOuzts
ElsiOuzts 8 years ago

It's not a Cocklebur. Each stem only has 1 head.

ElsiOuzts
Spotted by
ElsiOuzts

Oregon, USA

Spotted on Jan 21, 2013
Submitted on Jan 21, 2013

Noah Guardians
Noah Sponsors

Join the Project Noah Team Join Project Noah Team