involucres

The flowers are usually arranged in simple or compound umbels, and the main and subordinate clusters may or may not be provided with involucres and involucels.

Scientific American Supplement, No. 829, November 21, 1891 Various

It is very available for household decoration, with its four great creamy petals, -- flowers they are not, but floral involucres, -- each with a fantastic curl and stain at its tip, as if the fireflies had alighted on them and scorched them; and yet I like it best as it peers out in barbaric splendor from the delicate green of young Maples.

The Atlantic Monthly, Volume 10, No. 62, December, 1862 Various

In addition special involucres around the archegonia have arisen independently in several series.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Various

_Medicago_, the fruit of the water-caltrops, _Melia_ and _Zizyphus_, the cups of the acorn, the involucres of the beech, the seeds of _Coix lacryma_, etc.

Scientific American Supplement, No. 530, February 27, 1886 Various

It seldom attains more than from one inch to two inches in height, forming a dense rosette of short, hairy, oval leaves, in the center of which the bright purple involucres, in the form of a ball, are extremely interesting.

Scientific American Supplement, No. 433, April 19, 1884 Various

The nuts, with their leaflike involucres, are attractive in appearance in August and September.

Northern Nut Growers Association, Report Of The Proceedings At The Tenth Annual Meeting. Battle Creek, Michigan, December 9 and 10, 1919

Pinnæ triangular-ovate, usually distant, the ends of the rounded lobes reflexed and forming separate involucres which are pushed back by the ripening sporangia.

The Fern Lover's Companion A Guide for the Northeastern States and Canada George Henry Tilton

This resulted in more abundant flowers and some abortive involucres but still no nuts developed.

Growing Nuts in the North A Personal Story of the Author's Experience of 33 Years with Nut Culture in Minnesota and Wisconsin Carl Weschcke 1933

Flowers pink, verticillate, in opposite clusters around the stem, with several linear and hairy involucres at the base of each cluster.

The Medicinal Plants of the Philippines Jerome Beers Thomas 1891

The glands of the involucres are elliptic or oblong, and even the seeds vary in shape.

Species and Varieties, Their Origin by Mutation Hugo de Vries 1891