Cerastium glomeratum explained

Cerastium glomeratum is a species of flowering plant in the family Caryophyllaceae known by the common names sticky mouse-ear chickweed and clammy chickweed. It is native to Europe, Macaronesia to Assam but is known on most continents as an introduced species.^[1] It grows in many types of habitat. The blooming period is February, March, April, and May.^[2]

Description

This is an annual herb growing from a slender taproot. It produces a branched stem up to 45 centimeters tall, with abundant glandular and non-glandular hairs. The leaves are opposite, hairy, up to 2 cm long, and the basal ones typically die back before flowering. The bracts are green, hairy and generally similar to the leaves.

The inflorescence bears as few as 3 or as many as 50 small, dioecious flowers arranged in a cyme and borne on very short pedicels. Each flower has 5 hairy green sepals which are occasionally red-tipped, and 5 white bifid petals which are a few millimeters long and generally about the same length as the sepals. The fruit is a capsule less than a centimeter long which is tipped with ten tiny teeth.^[3]

Identification

This plant usually has abundant glandular hairs towards the top of the stem and on the sepals. Because it is an annual, plants are easily uprooted and every stem develops flowers. The flowers are also borne on very short pedicels (stalks), so they tend to occur in tight clusters.^[4]

Taxonomy

It was named by Jean Louis Thuillier in his "Flore des Environs de Paris" (1800). Many synonyms have been coined over the years, which are listed in the Synonymic Checklists of the Vascular plants of the World. Many forms, varieties and subspecies have also been named, but none is now widely accepted. It is not known to hybridise with any other species.^[5]

Its chromosome number is 2n=72.

Habitat

Frequent in waste places,^[3] walls, banks and arable land.^{[6] [7]}

Uses

The leaves and shoots were used as a wild food in ancient China.^[8] In Nepal, the juice of this plant was applied to the forehead to relieve headaches. The juice could also be dropped into the nostrils to treat nosebleeds.^[9]

The leaves can also be boiled and eaten.^[10]

External links

• Jepson Manual Treatment
• USDA Plants Profile
  • Flora of North America
• Photo gallery

Notes and References

1. Web site: Plants of the World Online . Cerastium glomeratum Thuill. . Royal Botanic Garden, Kew . 16 April 2023 .
2. Web site: Calflora: Cerastium glomeratum. www.calflora.org. en. 2017-05-10.
3. Parnell, J. and Curtis, T. 2012 Webb's An Irish Flora. Cork University Press.
4. Book: Stace . C.A. . New Flora of the British Isles . 2019 . Suffolk . 978-1-5272-2630-2.
5. Book: Stace . C.A. . Hybridization and the Flora of the British Isles . 1975 . Academic Press . London . 0-12-661650-7.
6. Hackney, P. (editor) 1992. Stewart & Corry's Flora of the North-east of Ireland. Institute of Irish Studies, The Queen's University of Belfast.
7. Clapham, A.R., Tutin, T.G. and Warburg, E.F. 1968. Excursion Flora of the British Isles. Second edition. Cambridge University Press.
8. Read. B.E. (1977) Famine Foods of the Chiu-Huang Pen-ts'ao. Southern Materials Centre, Taipei.
9. Web site: Cerastium glomeratum sticky chickweed PFAF Plant Database. www.pfaf.org. 2017-05-10.
10. Book: Niering . William A. . William Niering. Olmstead . Nancy C. . The Audubon Society Field Guide to North American Wildflowers, Eastern Region . 1985 . 1979. Knopf . 0-394-50432-1 . 455.