YELLOW GROUP 



The stems are full of a yellowish acid juice. Flowers in a 

 small umbel. 



" Long as there's a sun that sets, 

 Primroses will have their glory; 

 Long as there are violets, 



They will have a place in story; 

 There's a flower that shall be mine — 

 'Tis the little celandine." 



— Wordsworth. 



Horn Poppy. Sea Poppy 



Glaucium fla<vum. — Family, Poppy. Color, yellow. Sepals, i. 

 Petals, 4. No style, but a 2-lobed stigma, the lobes hollowed out. 

 Fruit, a rough pod, 6 to 10 inches long, made 2 -celled by a false 

 partition. Flowers, axillary and terminal. Leaves, clasping the 

 stem, pinnately cleft below, lobed and toothed above. Stem, 2 to 3 

 feet high. When broken it emits a yellowish juice like the celan- 

 dine, of which it is a near relative. Summer. 



In dry fields and waste places from Long Island to Mary- 

 land and Virginia near the coast. Rather rare. 



Golden Corydalis 



Corydalis aurea Family, Fumitory. Color, golden yellow. 



Sepals, 2, small, scale-like. The corolla is spurred at the base on 

 the upper side, the spur being about half as long as the tube of 

 the corolla. Stamens, in 2 sets, 3 in each set, opposite the 3 

 largest petals. Flowers, in racemes on short pedicels. Leaves, 

 broad for the genus, finely dissected into small segments. Pods, 

 long, curved, prominent. March to May. 



Rocky banks and woods from Vermont westward to Wis- 

 consin and southward to Pennsylvania. Also in the Rocky 

 Mountains. 



White Mustard 



Brassica alba. — Family, Mustard. Color, yellow. Flowers, 

 large, on somewhat stout pedicels in terminal racemes. Leaves, 

 with petioles, lyrate, variously cut, the terminal lobe round and 

 large. 2 to 5 feet high, stout and much branched. Pod tipped 

 with a sword-shaped, 1 -seeded beak. 



Common name taken from the color of the seed. Culti- 

 vated for table use, it has spread and become a weed. 



Black Mustard 

 B. nigra bears yellow flowers in slender racemes. Leaves, the 

 lower ones lyrate, the terminal lobe being large and often di- 



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