BLUE AND PURPLE FLOWERS 
Blue Linaria. Blue Toadflax {Linaria canadensis). 
Figwort family. May to September. 
A biennial or annual with slender, upright stem, several 
inches to two feet high; flowers very small, light-blue, racemed 
on stem ; calyx five-pointed, corolla two-lipped, with spur, four 
stamens in pairs of unequal length. The leaves are linear, 
generally alternate, not toothed. Found in sandy soil. (Name 
from linum, flax.) 
Great Lobelia ( Lobelia siphilitica) . Lobelia family. 
July to October. 
A somewhat hairy perennial with maximum height of three 
feet; flowers light-blue, nearly one inch long, with stalks; 
calyx five-pointed, hairy; ^orolla (one-half inch) two-lipped, 
lips respectively two-cleft and three-cleft, the former split 
to the bottom, so that the (united) stamens are free from 
the corolla. Leaves pointed at both ends, irregularly toothed, 
without stalks, except the lower, which are inversely egg- 
shaped and long-stalked. Low ground. Named for Mathias 
de I'Obel. 
Indian Tobacco {Lobelia inflata). Lobelia family. July 
to November. 
An upright annual, maximum height two feet; flowers similar 
to above but much smaller and with noticeably inflated pod. 
Leaves egg-shaped to oblong, sparingly toothed. This is the 
officinal lobelia formerly much used as an emetic. 
Pale Spiked Lobelia {Lobelia spicata). Lobelia family. 
June to August. 
An upright perennial, or biennial, with maximum height of 
four feet and slender leafy stem. The flowers are similar to 
those of Indian Tobacco, but the pod is not inflated. 
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