36 FOUNDATIONS OF BOTANY 
X. TULIPA, Tourn. 
Stemless herbs from coated bulbs. Leaves sessile. Scape 
simple. Flower solitary, erect. Perianth bell-shaped. Stamens 
short, awl-shaped, with broadly linear anthers. Style short, 
stigma thick, 3-lobed. Ovary and pod triangular. 
1. T. gesneriana,L. Common Tutte. Leaves 3-6, ovate-lanceo- 
late, close to the ground. Flower large, on a smooth peduncle, color 
red, yellow, white, or variegated. Cultivated from Asia Minor. 
Many garden varieties exist. 
XI. ERYTHRONIUM, L. 
Nearly stemless herbs, arising from rather deeply buried 
bulbs. Leaves 2, long and smoot!™ with underground petioles. 
Scape arising from between the bases of the leaves. Flower 
commonly single, nodding. 
1. E. americanum, Ker. YELLOW ADDER’S-TONGUE. Leaves 
mottled. Flowers handsome. Perianth light yellow, style club- 
shaped, stigmas united. 
2. E. albidum, Nutt. Wuire Doa’s-rootn VioLetT. Leaves 
not much mottled. Perianth bluish-white. Stigmas 3, short and 
spreading. 
XI. SCILLA, L. 
Perennial stemless herbs from coated bulbs. Leaves linear. 
Flowers racemed ona scape, generally blue. Divisions of the 
perianth 1-nerved, parted almost to the base. Filaments 6, 
often broad at the base. Style slender, with a knob-like 
stigma. Ovary 3-angled, 3-celled. 
1. S. sibirica, Andr. Srpertan Squiiy. Scapes 3-8 in. high, 
several from each bulb, 2-3-flowered. Leaves 2—4, narrowly strap- 
shaped.. Flowers intense blue, short-peduncled, often nodding. 
Cultivated-from Russia and Siberia. 
XIII. CAMASSIA, Lindl. 
Stemless herbs, from coated bulbs. Leaves linear. Flowers 
racemed, on a scape. Perianth of 6 blue or purple spreading 
sepals. Stamens*with thread-like filaments, from the base of 
the perianth. Style thread-like, ending in a knobbed stigma. 
Capsule 3-angled, 3-celled, several-seeded. 
