728 SPONDIACEAE 



Leaves 3-foliolate throughout. 



Leaves 2-5 cm. long ; lateral leaflets with mostly obovate blades. 1. S. trilobata. 



Leaves 5-10 cm. long ; lateral leaflets with mostly ovate blades. 2. S. aromatica. 



Leaves pinnately compound, 5-many-foliolate. 

 Rachis of the leaf winged. 



Panicles contracted, raceme-like : leaves 2-2.5 cm. long. 3. S. microphylla. 



Panicles pyramidal : leaves 1-4 dm. long. 



Leaflets acute or acuminate : wings of the rachis broad. 



Leaflets long-acuminate, falcate : drupes about 6 mm. broad. 4. S. lanccolata. 



Leaflets acute or short-acuminate, not falcate : drupes about 4 mm. broad. 5. S. copallina. 

 Leaflets rounded at the apex : wings of the rachis very narrow. 6. S. obtusifolia. 



Rachis of the leaf not winged. 



Leaflets with entire blades. 7. S. virens. 



Leaflets with toothed blades. 



Foliage more or less glaucous or pale. 



Twigs, panicles and drupes bristly pubescent with long spreading hairs. 8. S. hirta. 

 Twigs, panicles and drupes usually pubescent with soft very short hairs. 



Leaflets with acuminate, sharply serrate blades. 9. S. glabra. 



Leaflets with crenate-serrate blades, rounded at the apex. 10. S. Ashei. 



Foliage densely pubescent with brownish hairs, not glaucous. 11. S. Michauxii. 



1. Schmaltzia trilobata (Nutt. ) Small. An offensive-scented shrub 0.5-1 m. or 

 rarely 2 m. tall, the brandies often gnarled. Leaves 2-5 cm. long, densely pubescent, or 

 nearly glabrous, petioled ; leaflets 3, the blades firm, sessile, crenate or incised above, the 

 terminal one cuneate, tbe lateral ones obovate, much smaller than the terminal one : flow- 

 ers greenish, in dense spike-like I'acemes : sepals oblong, obtuse, 1.5 mm. long, slightly 

 concave : petals oblong, 3 mm. long, obtuse : drupes subglobose, 6-7 mm. in diameter, 

 crowded, bristly pubescent : stone lenticular, broader than high, gibbous. \_Rhus trilobata 

 Nutt.] 



On plains and prairies, Missouri to North Dakota, Washington, California and Texas. Spring. 

 Skunk Bush. Ill-scented Sumac. 



2. Schmaltzia aromatica (Ait. ) Desv. A straggling aromatic slirub 1-10 dm. tall. 

 Leaves 5-10 cm. long, petioled ; leaflets 3, the blades leathery, coarsely crenate or serrate, 

 sometimes incised, 2-6 cm. long, pubescent or rarely glabrous, the terminal one ovate to 

 obovate in outline, usually acute or acuminate at the apex, more or less cuneate at tlie base, 

 the lateral leaflets mostly ovate, inequilateral : flowers yellow, in dense spike-like racemes : 

 sepals oval, obtuse, about 1.5 mm. long: petals 5, oblong, 2.5 mm. long, obtuse, nearly 

 erect : stamens shorter than the petals : filaments subulate, about as long as the anthers : 

 drapes subglobose, 7-8 mm. in diameter, bristly pubescent. [Rhus aromatica Ait.] 



In sandy soil and rocky woods, Ontario to Minnesota, Florida and Louisiana. Spring. Fragrant 

 Sumac. 



3. Schmaltzia microphylla (Engelm. ) Small. A shrub 1-3 m. tall, with spreading 

 branches, the twigs fineh' pubescent. Leaves pinnately compound, 2-2.5 cm. long, the 

 rachis winged ; leaflets 7-9, the blades oblong, elliptic or obovate, 6-8 mm. long, sessile, 

 acute or obtuse, more or less pubescent : flowers in dense axillary clusters : sepals orbicular- 

 ovate, 1.5 mm. long, ciliate : petals oblong, 2-2.5 mm. long, very thin, fringed with long 

 cilia: drupes subglobose, about 5 mm. in diameter, bristly pubescent. [Rhus microphylla 

 Engelm.] 



On rocky hillsides and thickets, Texas to New Mexico and northern Mexico. Spring. 



4. Schmaltzia lanceolata (A. Gray) Small. A shrub 1-2 m. tall, or rarely lower. 

 Leaves pinnately compound, 1-2 dm. long, the racliis narrowly winged; leaflets 13-17, 

 the blades lanceolate or linear-lanceolate, more or less falcate, 3-7 cm. long, acuminate, 

 entire or indistinctly toothed, deep green and lustrous above, paler and softly pubescent 

 beneath, often sessile : panicle erect, 5-14 cm. high, its branches densely pubescent : flow- 

 ers white or greenish : sepals ovate, erect, 1 mm. long, obtuse : petals oblong-ovate, 2-2.5 

 mm. long, obtuse, curled back : stamens exserted : drupes lenticular, 6 mm. broad, pubes- 

 cent, dark red. [Rhus copallina var. lanceolata A. Gray.] 



In valleys and on dry uplands, Texas. Summer. 



5. Schmaltzia copallina (L. ) Small. A shrub or tree, reaching a height of 10 m., 



but often less than 1 m. tall, with a sticky milky sap and glabrous or pubescent foliage. 



Leaves pinnately compound, 1-3 dm. long, the rachis winged ; leaflets 9-21, the blades 



oblong or lanceolate or sometimes oval, 3-10 cm. long, normally acuminate and acute, 



undulate, sessile, lustrous above, paler and dull beneath : panicles broad, 0.5-3 dm. long, 



densely flowered : flowers greenish : sepals ovate, erect, about 1 mm. long, rather obtuse : 



petals oblong, obtuse, 2.5 mm. long, curled back : stamens in the staminate flowers exserted : 



drupes lenticular, nearly orbicular, about 4 mm. broad, finely pubescent, bright red : stone 



lenticular, shining. [Rhus copallina L.] 



In dry often stony soil, Maine to Ontario, Minnesota, Florida and Texas. Summer. Dwarf Sumac. 

 Smooth Sumac. Mountain Su.mac. 



