This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Annual or perennial showy usually glabrous herbs, natives of North America. Leaves simple or pinnate, opposite. Involucral bracts in two rows, the outer spreading and the inner combined at the base and erect. Receptacle furnished with linear chaffy scales. Fruit-achenes incurved, or flat on one side and convex on the other, 2-awned or truncate at the apex. The flowers of some species are strikingly beautiful, having a distinct brightly coloured eye, hence the application of the second name to some of them; and Coreopsis is a compound of kopis, a bug, and resemblance, from the appearance of the 2-awned achenes.
1. C. tinctoria. - A slender species about 2 feet high. Leaves pinnate; segments linear. Ray-florets few, broad, jagged at the tip. There are several varieties, differing in the colour of the flowers. The variety atropurpurea has them of a deep crimson purple with here and there a dash of orange, and in the ordinary form they are yellow with a purple-brown blotch at the base.
2. C. Drummondii. - A much dwarfer spreading slightly hairy species with orange-coloured flowers. Leaves pinnate, with ovate or lanceolate lobes.
C. coronata is another annual species about 1 foot high, bearing orange flowers spotted ' with brown.
3. C. auriculata (fig. 132). - A tall slender branching plant. Leaves auricled at the base. Flowers yellow, with a band of purple - brown encircling; the disk; peduncles very long and slender. Summer.
4. C. tenuifolia. - About 2 feet high. Leaves pinnately divided into numerous fine segments. Flowers yellow, about 1 1/2 inch in diameter, on short peduncles.
C. tripteris has tri-foliolate leaves and yellow flowers; C. lan-ceolata entire leaves and large yellow flowers; and C. verticillata, sessile leaves divided to the base into six or seven linear segments, and yellow flowers with a dark eye. C. aristosa is a handsome species of recent introduction. It is nearly glabrous, about a yard high, with pinnatisect leaves and large bright orange-yellow flower-heads. Pappus of two long spreading bristles.
Fig. 132. Coreopsis auriculata. (1/4 nat. size.)