Spring Flora of Oklahoma 
9 
white. Inner divisions toothless. Style slender except near the 
apex, bearing 3 short spreading stigmas. 
Rich soil. Near Avery, Oklahoma. March-May. 
2. Erythronium mesachoreum Knerr. Midland Adder’s tongue. 
Leaves narrowly lanceolate or linear-lanceolate, not mottled. Per¬ 
ianth-divisions bluish or lavender-tinted, scarcely or not at all re¬ 
curved. Stigmas spreading. 
Prairies. March-April. Oklahoma and Cleveland counties. 
FAMILY 5. CONVALLARIACEA3. Lily-of-the-Valley 
Family. 
Scapose or leafy-stemmed herbs, with simple or branched 
rootstocks, never with bulbs or corms. Flowers solitary, 
racemose, panicled or umbeled, regular and perfect. Leaves 
broad, alternate, verticillate or basal. Perianth inferior, 
4-6-parted with separate segments, or oblong, cylindric or 
urn-shaped and 6-lobed or 6-toothed. Stamens 6, hypogy- 
nous or borne on the perianth. Ovary 2-3-celled, superior. 
Fruit a fleshy berry. 
Perianth-segments separate. I. Streptopus. 
Perianth-segments united into a tube II. Polygonatum. 
I. STREPTOPUS Michx. 
Branching herbs, with horizontal rootstocks. Leaf- 
blades thinnish, sessile or clasping. Flowers solitary, or 
two together, nodding from extra-axillary peduncles. 
Perianth greenish or purplish. Sepals and petals 3 each, 
• separate, with spreading or recurved tips, the petals „ 
keeled. Stamens 6-hypogynous. Filaments flattened, very 
short. Ovary 3-celled. Stigma entire or 3-lobed. Berry 
red, oval, or sub-globose. 
1. Streptopus amplexifolius (L.) DC. Clasping-leaved 
Twisted-stalk. Rootstock short, stout, horizontal, covered with 
thick, fibrous roots. Plants 18'-36' high. Stem glabrous, usually 
branching below the middle. Leaves 2'-5' long, l'-2' wide, acumin¬ 
ate at the apex, cordate-clasping at the base, glabrous, glaucous be¬ 
neath. Peduncles l'-2' long, 1-2-flowered. Flowers greenish-white, 
4"-6" long. Perianth segments nearly lanceolate, acuminate. 
