262 TREES AND SHRUBS. 



on the Courtney plants that the variety Buckleyi was founded, for when this name was published nothing was known f R 

 jEsculus arguta, which was supposed to be the same as the Missouri plant. The synonymy of this form is,— ° Bnck tyi 



.Esculus glabra, var. Buckleyi, Sargent, Man. 645 (1905). 

 JEsculus glabra, var. arguta, Robinson, Gray, Syn. Fl. N. Am. i. pt. i. 447 (in part, not Pavia arguta Rafinesque n k 



arguta Buckley) (1897). H °' ***>* 



Msculus arguta, Mackenzie & Bush, Man. FL Jackson County, Missouri, 128 (1902). — Robinson & Fernald G 



ed. 7, 560. — Daniels, FL Columbia, Missouri, 173 (not Rafinesque nor Buckley). ' ***• ** 



This tree has flowered for several years in the Arnold Arboretum, where it was raised from seeds sent by Mr. B F B k f^_ 

 Courtney, Missouri. The leaves of the cultivated plants are more glabrous than those of the Courtney trees and ofte ' ' M- 



Here are added descriptions of two new varieties of jEsculus glabra: — 



their petioles slender, glabrous ; leaflets obovate-lanceolate to lanceolate, acute at the ends, finely o 



the exception of the pubescence on the upper side of the midribs of young leaves, pale green or glaueestJ 



lower surface with small axillary tufts of hairs, their petiolules short or elongated. Flowers and f 3 



• from 18 to 20 metres high, with a trunk sometimes 4.5 decimetres in diameter, usually much smaller and 

 ches, with smooth pale often nearly white bark, on old trees becoming light brown and separating in .mill 

 c plates. 8 ■"" 



"Sand hills, Red River, eastern Texas," Elihu Hall, July.l 872 (No. 87 in Herb. Gray). Arkansas : woods, Fulton IW 

 stead County, C. S. Sargent, April 18, 1901, March 26 and October, 1902, B. F. Bush, Aiprl 15, 1902 (No. 1358), April 17 19J5 

 (No. 2352), November 11, 1905 (No. 3838), April 5, 1909 (No. 5460), April 28, 1909 (No. 5541); Eureka Springs, Carroll 

 County, C. S. Sargent, May 8, 1902. Missouri : banks of the Niangua River east of Buffalo, Dallas County, C S Sarqent Mir 

 14, 1902 ; Swan, Christian County, B. F. Bush, May 24, 1905 (No. 2962), May 17, 1907 (No. 4517), October 8 1907 (No l2 

 C. S. Sargent, October, 1909. V '' 



This is the only yellow-flowered iEsculus I have seen in southern Missouri, and in Arkansas where it is common and when 



■ parts of the country. It blooms later than JEsadm 

 from other forms of that tree, on which the bark of 

 ck, darker colored and deeply furrowed. The leaflets of the 



l larger size, so far 

 glabra in northern Missouri, and the pale smooth bark well distingui 

 young individuals is dark brown and scaly, becoming on old 



Fulton trees are green on the lower surface with the axillary tufts of hairs well developed, but 

 paler or glaucescent on the lower surface with smaller axillary tufts. 



This variety, raised from seeds collected at Fulton by Mr. B. F. Bush, is established in the Arnold Arboretum and first flowered 

 here in May, 1910. 



iEsCULUS GLABRA, var. MICRANTHA, n. var. 



Leaves five-foliate, their petioles slender, glabrous, from 6 to 10 centimetres in length ; leaflets lanceolate to oblongJ— -*■ 



and long-pointed at the apex, gradually narrowed and cuneate at the base, finely often doubly serrate and ghl n.u< 

 „««. „_ exception of minute tufts of axillary hairs, from 1 to 1.2 decimetres long and from 4.5 to 5 centimetres wide, their 

 petiolules pubernlous, from 4 to 8 millimetres in length. Flowers from 1 to 1.2 centimetres long, on slender puberulous pedicels, 

 in narrow compact many-flowered corymbs ; calyx campanulate, from 3 to 4 millimetres in diameter, dull red, five-lobed, the lobes 

 ovate, rounded at the apex, ciliate on the margins ; petals oblong-obovate, narrowed and rounded at the apex, ciliate on the 

 margins, pale yellow; anthers exserted; filaments and styles sparingly villose. Mature leaves and fruit unknown. 



A low shrub, borders of woods, Fulton, Hempstead County, Arkansas, B. F. Bush and C. S. Sargent, March 26, 1909. 



The flowers of this variety are smaller than those of any other North American ^Esculus. The color of the calyx suggests » 

 possible hybrid between Msculus discolor, var. mollis and jEsculus glabra, var. leucodermis, which were both common where these 

 plants were growing. The leaves, however, show no trace of the pubescence of those of the former, and the margins of the petob 

 are without the glands which appear in greater or less numbers on the margins of the petals of hybrids of species of the Enparo 

 subsection of Pavia. Possibly this variety should be considered a species; but nthout f ruif 11 d mature leaves, and as only two 

 plants have been seen, it seems best to t; 



