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rust, in botany

(Encyclopedia)rust, in botany, name for various parasitic fungi of the order Uredinales and for the diseases of plants that they cause. Rusts form reddish patches of spores on the host plant. About 7,000 species ar...

rye, in botany

(Encyclopedia)rye, cereal grain of the family Poaceae (grass family). The grain, Secale cereale, is important chiefly in Central and N Europe. It seems to have been domesticated later than wheat and other staple gr...

tupelo , in botany

(Encyclopedia)tupelo: see black gum.

bast, in botany

(Encyclopedia)bast: see bark.

thorn , in botany

(Encyclopedia)thorn, sharp-pointed projection on some plants, usually protective in function. Botanically, thorns are distinguished as modified stems (as in the honey locust and hawthorn) from spines, which are mod...

timothy , in botany

(Encyclopedia)timothy or herd's-grass, perennial plant (Phleum pratense) of the family Poaceae (grass family), native to Europe and W Asia and one of the most widely cultivated hay grass of North America. Adaptable...

pulse, in botany

(Encyclopedia)CE5 Sweet pea, Lathyrus odoratus, a member of the pulse family pulse, in botany, common name for members of the Fabaceae (Leguminosae), a large plant family, called also the pea, or legume, family...

bitterroot, in botany

(Encyclopedia)bitterroot: see purslane.

berry, in botany

(Encyclopedia)berry: see fruit.

rape, in botany

(Encyclopedia)rape, in botany, annual herb (Brassica napus) of the family Cruciferae (or Brassicaceae; mustard family), belonging to the same genus as the cabbage, the mustard plant, and the turnip (which it resemb...