SAPINDACE.E 717 



on the same tree. Fruit ripening in September, f ' long, with a sweet rather agreeable 

 flavor. 



A tree, sometimes 3o-40 high, with a trunk occasionally 18'-20' in diameter, and 

 branchlets pale green when they first appear, becoming gray during their first season and 

 bright red-brown the following year; generally much smaller. Bark of the trunk rarely f ' 

 thick, marked by shallow depressions and numerous minute lenticels. Wood very heavy, 

 hard, close-grained, rich dark brown, with thin darker colored sapwood of 4 or 5 layers of 

 annual growth; very durable in contact with the soil and valued in Florida for posts; also 

 used in shipbuilding and for the handles of tools. 



Distribution. Southern Florida, Upper Metacombe, Umbrella and Windley's Keys; rare. 



4. UNGNADIA Endl. 



A tree or shrub, with thin pale gray fissured bark, slender terete slightly zigzag branch- 

 lets, without a terminal bud, marked by large conspicuous obcordate leaf-scars, small ob- 

 tuse nearly globose winter-buds covered with numerous chestnut-brown imbricated scales, 

 and thick fleshy roots. Leaves long-petioled, 5 or 7 or rarely 3-foliolate, deciduous; leaflets 

 ovate-lanceolate, acuminate, rounded or cuneate, and often oblique at base, irregularly 

 crenulate-serrate, coated when they first appear on the lower surface like the petiole with 

 dense pale tomentum, and pilose above, glabrous at maturity w r ith the exception of a few- 

 hairs on the lower surface along the principal veins, pinnately veined, reticulate-venulose, 

 the terminal leaflet long-petiolulate, the others short-petiolulate to subsessile. Flowers 

 irregular, polygamous, in small pubescent fascicles or corymbs appearing just before or 

 with the leaves from the axils of those of the previous year, usually from separate buds, or 

 occasionally from the base of leafy branches; calyx 5-lobed, hypogynous, the lobes oblong- 

 lanceolate, somewhat united irregularly at base only, deciduous; petals 4 by the suppression 

 of the anterior one, or 5 and then alternate with the lobes of the calyx, hypogynous on the 

 margin of a thickened truncate torus, unguiculate, bright rose color, deciduous, the claw as 

 long as the lobes of the calyx, nearly erect, clothed with tomentum, especially on the inner 

 surface, conspicuously appendaged at the summit with a fimbricated crest of short fleshy 

 tufted hairs, the blade obovate, spreading, often erose-crenulate; disk unilateral, oblique, 

 tongue-shaped, surrounding and connate w r ith the base of the stipe of the ovary; stamens 

 7-10, usually 8 or 9, inserted on the oblique edge of the disk, much exserted and unequal, 

 the anterior ones shorter than the others, equal or almost so and shorter than the petals in 

 the pistillate flower; filaments filiform; anthers oblong, attached near the base; ovary ovoid, 

 3-celled, pilose, raised on a long stipe, rudimentary in the staminate flower; style subulate, 

 filiform, elongated, slightly curved upward; stigma minute, terminal; ovules 2, borne on 

 the inner angle of the cell near its middle, ascending, the micropyle inferior. Fruit a 

 coriaceous 3-celled loculicidally 3-valved broad-ovoid capsule, conspicuously stipitate, 

 crowned with the remnants of the style, rugosely roughened and dark reddish brown, locu- 

 licidally 3-valved, the valves somewhat cordate, bearing the dissepiment on the middle. 

 Seed generally solitary by abortion, almost globose; seed-coat coriaceous, very smooth and 

 shining, dark chestnut-brown or almost black; hilum broad; tegmen thin; embryo filling 

 the cavity of the seed; cotyledons thick and fleshy, nearly hemispheric, conferruminate, 

 incumbent on the short conic descending radicle turned toward the hilum, remaining below 

 ground in germination. 



Ungnadia with a single species is confined to Texas, New Mexico, and northern Mexico. 



The name is in honor of Baron Ferdinand von Ungnad, Ambassador of the Emperor 

 Rudolph II. at the Ottoman Porte who sent seeds of the Horsechestnut-tree from Con- 

 stantinople to Vienna in the middle of the sixteenth century. 



1. Ungnadia speciosa Endl. Spanish Buckeye. 



Leaves appearing from March to April with or just after the flowers, 6'-12' Jong, with a 

 petiole 2'-6' in length, rather coriaceous leaflets, dark green and lustrous on the upper sur- 



