336 BORAGINACEAE (BORAGE FAMILY) 
narrow lance-shaped, two to four inches long, the lower ones taper- 
ing to margined petioles, the upper ones sessile. Racemes long, 
ascending, many-flowered, usually in pairs; corolla blue, more 
than a quarter-inch broad, the five lobes spreading; pedicels 
nearly as long as the flower, reflexed in fruit. Burs about aquarter- 
inch long, the four nutlets keeled, margined with a single row of 
flattened, awl-like, barbed prickles. 
Means of control the same as for Léppula echinata. 
YELLOW BURWEED 
Amsinckia intermedia, F. and M. 
Other English names: Yellow Tarweed, 
Fireweed, Yellow Forget-me-not. 
Native. Annual. Propagates by seeds. 
Time of bloom: May to July. 
Seed-time: June to August. 
Range: Pacific Coast. 
Habitat: Grain fields, meadows, pastures, 
and vineyards. 
An unpleasant, hairy weed, with sticky, 
bristly burs which make it a pest to Cali- 
fornia wool-growers. Stem erect, clothed 
with stiff white bristles, one to three feet 
high, with spreading branches. Leaves 
rather thick, lance-shaped to linear, en- 
tire, and thickly covered with fine, bristly 
hairs much shorter than those on the 
stem. Flowers in crowded, terminal, 
leafy-bracted racemes which lengthen as 
the succession of bloom approaches the 
summit; when developed, the racemes may 
be five to ten inches long, peduncled, and 
have usually matured seeds at the base 
before the latest buds are unfolded. Co- 
rolla orange-yellow, about a quarter-inch 
broad, its five lobes spread salver-form, 
Fra. 233.— Yellow and the tube enclosed for about half its 
Burweed (Amsinckia in- 7 4 : 
termedia). x}. length in a bristly calyx with very narrow, 
