Family PORTULACACEA 79 
Aments appearing with the leaves; stamens several. 
Leaves narrowly lanceolate; petioles short; capsule twice as 
long as its pedicel. 1. S. nigra. 
Leaves broader; petiole longer; capsule about as long as 
its pedicel. 2. S. amygdaloides. 
Aments appearing before the leaves; stamens two; stipules 
large and usually persistent. 4. S. cordata. 
Leaves with distant teeth, or entire; linear to linear-lanceolate. 
5. S. fluviatilis. 
Leaves entire or sparingly serrulate, puberulent or tomentose be- 
neath or becoming glabrate in age; stamens two. 
Aments appearing with the leaves; old leaves glabrate or sparingly 
tomentose beneath. 6. S. bebbiana. 
Aments appearing before the leaves; leaves permanently densely 
gray tomentose beneath, edges revolute. 7. S. humilis. 
1. Salix nigra Marshall. Black Willow. 
In low, wet places, mostly along streams, in the eastern part of the 
state. Fairbury; Lincoln; Nemaha; Peru; Wahoo. 
2. Salix amygdaloides Anders. Peach-leaved Willow. 
Along streams over most of the state. Crete; Ewing; Lincoln; 
Nance county; O’Neill; Red Cloud; Saunders county; St. James. 
3. Salix lucida Muhl. Glossy Willow. 
Along streams in the eastern part of the state. Fairbury; Weeping 
Water. 
4, Salix cordata Muhl. Diamond Willow. 
Common, especially along streams and on wooded islands. Belmont; 
Burwell; Cherry county; Long Pine; Minden; Mullen; Norway; Peru; 
Talmage; Thedford. 
5. Salix fluviatilis Nutt. Sand-bar Willow. 
Common, forming dense thickets in wet places mostly along streams. 
Crete; Lincoln; Milford; Peru; Scotts Bluff county; Thedford; Valen- 
tine; Weeping Water. 
6. Salix bebbiana Sarg. 
In dry soil in the western part of the state. Belmont; Pine Ridge. 
7. Salix humilis Marshall. Prairie Willow. 
In dry prairies. Anselmo; Cass county; Cherry county; Crete; 
Ewing; Long Pine; Minden; Weeping Water. 
4. PORTULACACEZ. 
Purslane Family. 
Ovary superior; capsule not circumscissile; perennials. 
Seeds numerous; leaves all basal, terete. 1. Talinum. 
Seeds 3-6; leaves few, not all basal. 2. Claytonia. 
Ovary partly inferior; capsule circumscissile; annuals. 3. Portulaca. 
1. Talinum. 385. 
Petals 5 mm. long; stamens 5. 1. T. parviflorum. 
Petals usually 8-10 mm. long; stamens 12-50; roots very thick. 
2. T. calycinum. 
1. Talinum parviflorum Nutt. Fame-flower. 
In dry soil mostly in the western part of the state. Long Pine; 
Minden. 
