APRIL 1 TO JUNE 30, 1915. 51 



40561 to 40600— Continued. 



the fruit is about one-third inch long." (W. J. Bean, Trees and Shrubs 

 Hardy in the British Isles, vol. 2, p. 145.) 



40589. Piptanthus concolor Harrow. Pabacese. 



(Wilson No. SS5.) From Tatsienlu, western Szechwan, China, occur- 

 ring in thickets at an elevation of 2,300 to 3,500 meters. 



40590. Potentilla fruticosa L. Rosacea*. 



(Wilson No. 1213.) A common American shrub, much branched, up 

 to 4 feet in height, with peculiar shreddy bark. The leaves are com- 

 posed of three to seven leaflets, and the numerous showy bright-yellow 

 flowers are up to 1$ inches in width and appear all through the summer. 

 This shrub is also common on exposed rocky mountain slopes above 

 2,500 meters (8,125 feet) in western Szechwan and rarely in Hupeh, 

 China. It is extremely variable in size of leaves and flowers and in the 

 degree of hairiness. Wilson's No. 1213 was collected in October, 1910, 

 at Mupin, western Szechwan, in thickets and rocky places. (Adapted 

 from Bailey, Standard Cyclopedia of Horticulture, and Sure/cut, Plantae 

 Wilsonktnae, vol. 2, part 2, p. 302.) 



40591. Potentilla fruticosa albicans Rehder and Wilson. 



(Wilson No. 1213a.) This shrub differs from the species in the white 

 tomentose under surface of the leaflets. The leaves are composed of 

 five dull grayish green leaflets, and the bright-yellow flowers are about 

 2 cm. (four-fifths inch) wide. The foliage strongly resembles that of 

 P. fruticosa vilmoriniana. Wilson No. 1213a was collected at Tatsienlu, 

 western Szechwan. at altitudes of 3,300 to 4,000 meters (10,000 to 13,000 

 feet), November, 1908. (Adapted from Sargent, Plantae Wilsonianae, 

 vol. 2, part 2, p. 302.) 



40592. X Malus arnoldtana Rehder. Malacese. Crab apple. 

 "A plant which is evidently a hybrid of M. floribunda with one of the 



hybrids of M. baecata appeared spontaneously in the Arboretum several 

 years ago and has been named M. amoldiana. It has much larger pink 

 flowers and larger fruit than M. floribunda, and in flower it is one of the 

 most -beautiful of all crab apples." (Arnold Arboretum, Bulletin of 

 Popular Information No. 39.) 



40593. Ribes lacustre (Pers.) Poiret. Grossulariacese. 



For previous introduction and description, see S. P. I. No. 4041 



40594. Rubus giraldianus Focke. Rosacea?. 



"A vigorous, deciduous shrub up to 8 or 10 feet high : its biennial stems 

 much branched toward the summit, pendulous ;it the end. covered with a 

 vividly white waxy covering, not downy, armed rather sparsely with broad- 

 based spines. Leaves pinnate, consisting of usually nine leaflets, and 

 from 5 to 8 inches long; the main stalk downy and armed with hooked 

 spines. Leaflets li to '21 inches long, three-fourths to 1 | inches wide, the 

 terminal one the largest; ovate or rather diamond shaped; lateral ones 

 oval-lanceolate; all unequally and rather coarsely toothed, slender 

 pointed, smooth above, white beneath, with a close felt. Inflorescence a 

 terminal panicle; the flowers small and of little beauty, purple; fruit 

 black. 



"Native of China: first found in the Province of Shensi by Giraldl, 

 later in Szechwan by Wilson, who introduced it in 1907. Its claims to 

 recognition in the garden are its remarkably white stems, which are as 



