268 TREES AND SHRUBS. 



rare in collections, is perhaps a form of JEsculus discolor. I have not seen the seeds, however, and it is not now known i n -i 

 state. All descriptions of JEsculus discolor in recent European dendrological works refer, I believe, to hybrids of JEscul^ 

 dra and jEsculus Pavia or jEsculus discolor, var. mollis, and the plants found in collections under the name of ^Esculus di^ohrT 

 usually also hybrids. 



Here is added the description of another red-flowered ^Esculus : — 



jEsculus Bushii, C. K. Schneider, 111. Handb. Laubholzk. ii. 251 (1909). 



Leaves five-foliate, their petioles stout, puberulous, becoming glabrous, from 1.2 to 1.4 decimetres in length; leaflets oblon 

 obovate, acuminate, usually abruptly long-pointed at the apex, cuneate at the entire base, finely often doubly serrate above "it 

 straight or incurved teeth; early in the season light yellow-green, puberulous on the upper side of the midribs and pale'rTnd 

 pubeseent below, especially on the midribs and veins, thin and glabrous at maturity, from 1 to 1.4 decimetres long and from 

 4.5 to 7 centimetres wide, with stout light yellow midribs and usually from 16 to 18 pairs of slender primary veins ; petiolul^ 

 stout, puberulous, becoming glabrous, from 4 to 6 millimetres in length. Flowers 2.5 centimetres long, on slender puberufoii! 

 pedicels in narrow compact scurfy-pubescent panicles ; calyx campanulate, bright pink, puberulous on the outer surface, glabrous 

 on the inner surface, about 1 centimetre long, five-lobed, the lobes ovate, rounded, glandular and ciliate on the margins; petal 

 ovate to obovate, those of the superior and lateral pairs very unequal in size, pink and yellow, puberulous and glandular on th 

 outer surface, furnished on the margins with glands intermixed with occasional hairs, their claws slightly ciliate on the margins- 



amens seven, exserted ; filaments slightly villose, like the ovary and style. Fruit subglobose to broad-obovate, many-seeded' 



ith thin dark brown smooth or slightly and irregularly echinate valves ; seeds dark chestnut-brown, very unequal in size, usually 



om 2 to 3, sometimes from 4 to 4.5, centimetres in diameter. 



A tree, from 10 to 12 metres high, with a trunk from 4 to 5 decimetres in diameter covered with dark scaly bark, short stout 



■anches making a narrow round-topped head, and stout branchlets light reddish brown and puberulous and marked bv small 



lie lenticels when they first appear, becoming glabrous and darker-colored during their second year. Winter-buds acute, from 



to 2 centimetres long, with light brown acute apiculate scales. 



Arkansas : borders of woods, near Fulton, Hemstead County, B. F. Bush and C. S. Sargent, April 18, 1901, B. F. Bush, October 



r, 1901, and April 15, 1902 (1457, type). 



Schneider's suggestion that this tree is a hybrid between JEsculus austrina (discolor, var. mollis) and sEsculus glabra is perhaps 

 the correct one. JEsculus discolor, var. mollis, and JEsculus glabra, var. leucodermis, are very common at Fulton. On the margins 

 of the petals on the type specimen of JEsculus Bushii there are a few hairs only scattered among the conspicuous glands, while on 

 the plant raised in the Arnold Arboretum from seeds gathered by Mr. Bush from one of the Fulton trees the margins of the 

 petals are densely ciliate and show no trace of glands. The calyx of JEsculus Bushii is like that of JEsculus glabra except in color, 

 and the unequal petals are in shape those of JEsculus discolor var. mollis. The color of the flowers shows the influence of the two 

 species. The fruit is as large as that of JEsculus discolor, var. mollis, but dark-colored and either smooth or roughened by the 

 ubercle-like base of prickles. The seeds show no trace of the peculiar color of those of JEsculus discolor, var. mollis, and are of 

 he normal color of Horsechestnut seeds. The leaves of the plant cultivated in the Arnold Arboretum are sometimes seven- 

 oliate, and the leaflets of this plant are covered below with the soft pale pubescence of JEsculus discolor, var. mollis. 



In recent visits to Fulton neither Mr. Bush nor I have succeeded in finding the trees of JEsculus Bushii, which have possibly 

 been destroyed, and it is not impossible that the single tree growing in the Arnold Arboretum is now the only representative of 

 this hybrid. C . S. S. 



EXPLANATION OF THE PLATE. 

 Plate CXCIX. JEsculus Pavia. 



1. A flowering branch, natural size. 



2. Vertical section of a flower, enlarged. 



3. A lateral petal, enlarged. 



4. A superior petal, enlarged. 



5. A stamen, enlarged. 



6. A pistil, enlarged. 



7. A fruiting branch, natural size. 



8. A seed, natural size. 



