704 ' EUPHORBIACEAE 



1. Sapium sebiferum (L. ) Roxb. A large tree reaching a height of 15 m. , the foli- 

 age glabrous deep green. Leaf-blades rhombic, 4-8 cm. long, acuminate, undulate, broadly 

 cuneate at the base ; petioles slender, about as long as the blades or longer : spikes terminal, 

 5-10 cm. long, continuous : capsules depressed, 3-lobed, 1.5 cm. broad, abruptly pointed : 

 seeds 8-9 mm. long, white. 



In sandy soil, South Carolina to Florida and Louisiana. Native of China and Japan. Spring. 



2. Sapium glandulosum (L. ) Morong. A shrub or a tree becoming fully 13 m. tall> 

 Leaf-blades linear-oblong or narrowly oblong, 8-16 cm. long, serrulate ; petioles 10-16 

 mm. long : spikes 5-9 cm. long, more or less interrupted : capsules 2-lobed, about 1 cm. 

 broad : seeds 6-7 mm. long. 



In sandy soil, Pensacola, Florida. Native of South America. Spring. 



16. STILLINGIA L. 



Monoecious herbs or shrubs, with glabrous foliage and simple or branched stems. 

 Leaves alternate or rarely opposite, often with 2 glands at the base : blades entire or toothed. 

 Staminate flowers several together in the axils of the bractlets. Calyx slightly 2-3-lobed. 

 Stamens 2-3, exserted. Pistillate flowers solitary in the axils of the lower bractlets. 

 Calyx 3-lobed. Ovary 2-3-celled, with a solitary ovule in each cavity : styles stout, some- 

 what united at the base. Capsule 2-3-lobed, separating into 2 or 3 2-valved carpels. Seeds 

 ovoid or subglobose. The plants flower in the spring and summer or throughout the year 

 in the extreme South. Queen's Delight. Queen-root. 



Plants annual. 1. S. dentata. 



Plants perennial. 

 Plants herbaceous. 



Capsules less than 10 mm. wide : seeds 4-6 mm. long. 

 Stem leaves with linear blades. 



Leaf-blades evenly serrulate with black-tipped teeth : lobes of the gyno- 

 phore wider "than high ; stems simple or umbellate above : species 

 Texano-Mexican. 2. S. linearifoUum. 



Leaf-blades very shallowly and crenulate serrulate : lobes of the gyno- 



phore higher than wide: stem dichotomous : species Floridian. 3. S. angustifolia. 



Stem leaves with spatulate or oblong-spatulate blades. 4. S. spathulata. 



Capsules over 10 mm. wide : seeds 7-9 mm. long. 



Stem leaves with lanceolate or elliptic serrulate blades. 5. S. salicifolia. 



Stem leaves with obovate, oval or oblong crenulate blades. 6. S. sylvafica. 



Plants shrubby. V. S. aquatica. 



1. Stillingia dentita ( Torr. ) Britt. & Rusby. Herbaceous. Stems branched at the 

 base, the branches spreading or decumbent, often branched again, angled, 1-3 dm. long : 

 leaf-blades spatulate to oblong-spatulate, 1-2.5 cm. long, sharply toothed with flaring or 

 rarely curved teeth, narrowed to the base and almost sessile : spikes shorter than the leaves 

 or slightly longer, rather loosely flowered : bracts triangular or triangular-lanceolate : calyx 

 very delicate, less than 1 mm. long : filaments long-exserted : capsules ovoid-globose, 4-4.5 

 mm. in diameter : seeds 3 mm. long, smooth or nearly so, not reticulated. 



In ravines, or on plains and prairies, Texas and adjacent Mexico. 



2. Stillingia linearifolia (Muell. Arg. ) Small. Herbaceous. Stems usually several 

 together, 3-6 dm. tall, slender, simple or umbellately branched above : leaf-blades linear, 

 often narrowly so, .3-8 cm. long, acute, evenly serrulate with black-tipped teeth : spikes con- 

 tinuous, 5-7 mm. long, erect : bracts broader than high : capsules 5-7 mm. wide : seeds 

 3-4 mm. long. \_S. f<ylvatica y linearifolia Muell. Arg. ] 



In dry or sandy soil, Texas to New Mexico and adjacent Mexico. 



3. Stillingia angustifolia (Torr.) S. Wats. Herbaceous. Stems solitary or few to- 

 gether, 2.5-6 dm. tall, dichotomous, slender : leaf-blades linear or essentially so, 2-5 cm. 

 long, rather blunt, shallowly and unevenly crenulate-serrulate : spikes slender, 2-4.5 cm. 

 long : capsules slightly depressed, 5-6 mm. wide : seeds about 4 mm. long. 



In sandy soil and about ponds, peninsular Florida and the Keys. 



4. Stillingia spathulata (Muell. Arg. ) Small. Herbaceous. Stems solitary or few 

 together, 3-7 dm. tall, sometimes branched below the sparingly umbellate top, or merely 

 dichotomous : leaf-blades spatulate to oblong-spatulate, or linear-spatulate on the branches, 

 7-15 cm. long, evenly crenulate, rather blunt : spikes 4-14 cm. long : capsules depressed, 

 7-9 mm. wide : seeds about 5 mm. long. [S. sylvalica a spatlmhta^ Muell. Arg.] 



In pine lands, Georgia, Alabama and Florida. 



5. Stillingia salicifolia (Torr. ) Small. Herbaceous. Stems usually several together, 

 3-11 dm. tall, simple or umbellately branched above : leaf-blades lanceolate to elliptic, 4- 

 11 cm. long, acute, serrulate : spikes 4-9 cm. long : capsules 12-15 mm. wide : seeds 7-8 

 mm. long. {_S. sylvatica fi salicifolia.'] 



In sandy soil, Kansas to Arkansas and Texas. 



