www.mobot.org Research Home | Search | Contact | Site Map  
 
Research
W³TROPICOS
QUICK SEARCH

MO PROJECTS:
Africa
Asia/Pacific
Mesoamerica
North America
South America
Floras
General Taxonomy
Photo Essays
Training in Latin
  America

MO RESEARCH:
Wm. L. Brown Center
Bryology
GIS
Graduate Studies
Research Experiences
  for Undergraduates

Imaging Lab
Library
MBG Press
Publications
Climate Change
Catalog Fossil Plants
MO DATABASES:
W³MOST
Image Index
Rare Books
Angiosperm
  Phylogeny

Res Botanica
All Databases
INFORMATION:
What's New?
People at MO
Visitor's Guide
Herbarium
Jobs & Fellowships
Symposium
Research Links
Site Map
Search

Projects
ORNAMENTAL PLANTS OF HORTICULTURE VALUE

Selection of perennials

Pyrethrum Zinn
Pyrethrum
Asteraceae (Compositae)

Pyrethrum
This genus rarely is considered a "good" one. Most species are now usually treated as Tanacetum, formerly but erroneusly it was included in Chrysanthemum sensu lato. Russian taxonomists have treated Pyrethrum as a separate genus. 56 species in the "Flora of the USSR", the bulk of them in the Caucasus and in Central Asia; only 8 are of wide distribution. Some species are already known in cultivation in the FSU and in Europe. Among them are P. carneum Bieb., P. coccineum (Willd.) Worosch., P. corymbosum (L.) Scop. and P. parthenium (L.) Smith, all known under Tanacetum. Some other species have been tested by botanical gardens and deserve special attention.

P. kelleri (Kryl. et Plotn.) Krasch.

Siberia (southern regions of Altay). On dry rocky slopes.

Evergreen plant 40-70 cm when flowering. Rhizome creeping. Flowering stems solitary or few, sparsely leafy. Leaves silver-grey pubescent. Basal leaves long-petiolate up to 20-25 cm x 6-7 cm, with oblong entire blade, margin smooth. Stem leaves few (3-7), short-petiolate with lyrate-pinnatisect blade. Flower head 4-5 cm diam., 1-6 per stem, stalk up to 20 cm. Flowers white, corolla 2 cm. V - early spring until frost. Fl - June-July for more than month. Fr - August. P - by division and seed. Requires a sunny place and well-drained soil. Very attractive species for the flower bed and for the rock garden. Z 5 (4). New.

SELECTION OF PERENNIALS
 
 
© 1995-2014 Missouri Botanical Garden, All Rights Reserved
P.O. Box 299, St. Louis, MO 63166-0299
(314) 577-5100

E-mail
Technical Support