STYRACE^: 



755 



Mohrodendron is confined to the southern United States; of the three species 

 two are trees. 



The generic name is in honor of Dr. Charles Mohr, author of the Flora of Alabama. 



CONSPECTUS OF THE ARBORESCENT SPECIES. 



Corolla slightly lobed ; filaments glabrous ; ovary 4-celled ; fruit 4-winged ; leaves oval or 

 ovate-oblong. L M Carolinum (A, C). 



Corolla divided nearly to the base ; filaments covered with pale hairs ; ovary usually 

 2-celled ; fruit 2-winged ; leaves ovate or sometimes slightly obovate. 



2. M. dipterum (C). 



1. Mohrodendron Carolinum, Britt. Silver Bell Tree. 



Leaves oval or ovate-oblong, gradually or abruptly contracted into long points 

 acute or rounded at the apex, wedge-shaped or rounded at the base, finely serrate, 



with remote callous teeth, when they unfold ciliate on the margins, coated below 

 and on the petioles with dense pale tomentuui, and bronze red and glabrous or 

 pilose above, and at maturity thin and firm, light bright green and pubertilous on 

 the upper, paler and more or less pubescent on the lower surface, especially along the 

 slender midribs and primary veins arcuate near the margins and connected by remote 

 reticulate veinlets, 4'-6' long and 2'-3' wide, turning light yellow late in the autumn 

 before falling; their petioles stout, ' long. Flowers nearly 1' in length, appearing 

 in early spring when the leaves are about one third grown, on slender drooping ped- 

 icels l'-2' long from the axils of ovate yellow-green caducous bracts '-f ' long and 

 \ f broad, in crowded fascicles or short few-flowered racemes; corolla slightly lobed, 

 narrowed below into a short tube, and bronze-red before anthesis; stamens 10-16; 

 filaments glabrous; ovary 4-celled. Fruit ripening late in the autumn and persistent 

 until winter, ellipsoidal, equally 4-winged, l^'-2' long, 1' wide; stone broadly obovate, 

 obscurely ridged, and contracted into a short or sometimes elongated stipe; seeds 

 rounded at the narrow ends, about ' long. 



A tree, occasionally 80-90 high, with a straight trunk sometimes 3 in diameter 

 and 50-60 long, short stout branches forming a narrow head, and slender branch- 

 lets coated at first with thick pale deciduous tomeutum, light reddish brown, gla- 



