12) burdock. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...Any of several weedy, chiefly biennial plants of the genus Arctium in the composite family, having pink or purplish flower heads surrounded by prickly bracts and...

13) celery. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...Inflected forms: pl. celˇerˇies1. A biennial European plant (Apium graveolens var. dulce) in the parsley family, having edible roots, leafstalks, leaves, and fruits....

14) floricane. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...The flowering and fruiting stem of a biennial plant, especially of a bramble. Latin flos, flor-, flower; see flower + cane....

15) Canterbury bells. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...(used with a sing. or pl. verb) A European biennial herb (Campanula medium) widely cultivated for its showy, bell-shaped, blue, pink, or white flowers. From the association...

16) biannual. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...1. Happening twice each year; semiannual. 2. Occurring every two years; biennial. biˇannuˇalˇly -ADVERB...

17) isthmian. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...an isthmus. 2. Of or relating to the Isthmus of Corinth, especially with regard to the biennial Pan-Hellenic games held there in antiquity....

18) blazing star. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...grouped in a dense raceme or panicle. Also called button snakeroot, gay feather. 3. A biennial plant (Mentzelia laevicaulis) of western North America, having large,...