Tickseed or Coreopsis

This genus consists of nearly 100 species including annuals, perennials and woody shrubs. They are native to North America and Central America. The name means "bug-like" which alludes to the form of the seed which is an achene (a dry, indehiscent usually 1-seeded fruit).

Several types of coreopsis are commonly grown in the home landscape. The thread-leaf, big flowered and lance coreopsis are probably the most common forms. Pink to reddish flowers of C. rosea are showing up with more cultivars in recent years.


PGC-P-Coreopsis-Early-Sunrise-3-2010-004
Coreopsis auriulata Eared Coreopsis

C. basalis
 aka C. drummondii

Goldenwave Coreopsis
C. caillopsidea California Coreopsis
C. grandiflora
 Big Flowered Coreopsis
C. lanceolata Lance Coreopsis
C. major Trefoil Coreopsis
C. palmata  
C. rosea Rose Coreopsis
C. tinctoria
aka Caillopsis bicolor		 Plains Coreopsis
C. tripteris Atlantic Coreopsis
C. verticillata Thread-leaved Coreopsis

Species Hgt
(in)		 Flower
Time		 Leaf
Shape
C. auriulata 'Nana' 6-9 Late Spring entire
C. grandiflora 12-24 Summer deeply cut
C. lanceolata 12-24 Summer moderately cut
C. verticillata 18-36 Summer thread-like segments

* Guides and Keys are from the book "Herbaceous Perennial Plants A Treatise on their Identification, Culture and Garden Attributes" by Dr Allan M. Armitage of the University of Georgia. Varsity Press, Athens, Georgia. 1989 ISBN 0-942375-00. More on Dr Armitage and his other books.

 
 
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