36 HOUGH'S AMERICAN WOODS. 



irregular, with imbricated lobes; stamens 2-5, didynamous or nearly equal and 

 inserted on the corolla alternate with its lobes; anthers 2 or 1-celled; pistil soli- 

 tary with slender style, entire or 2-lobed stigma and mostly 2-celled ovary con- 

 taining anatropous or amphitropous ovules on axile placentae. Fruit a capsule 

 usually containing numerous seeds with small embryo in copious albumen. 



This family consists chiefly of herbs, but some shrubs and trees, and is of very 

 wide distribution. About 2,500 species are known, grouped in 1G5 genera. 



GENUS PAULOWNIA, SIEB. & Zucc. 



Leaves opposite, long-petioled, mostly 5-8 in. long larger on vigorous shoots, 

 broad-ovate, cordate, acute or short acuminate, entire or with a single short- 

 pointed lobe on each side, velvety pubescent especially at first; long-petioled, 

 branchlets with segmented pith. Flowers before or with the leaves, fragrant, in 

 large erect rusty tomentose terminal panicles from buds formed the previous 

 summer and remaining naked during the winter; calyx with 5 thick lobes; corolla 

 l%-2 in. long, pale violet or blue, somewhat irregular, with 5 spreading lobes, 

 puberulent outside; stamens 4, didynamous, included, with divaricate anther-sacs. 

 Fruit broad-ovoid woody abruptly pointed 2-celled capsule, about 1% in. long, 

 loculicidally dehiscent and containing many small membranous-winged seeds. 



This is a genus composed of possibly two or three species of Asiatic trees but 

 is generally known only by the single species P. imperialis S. & Z., now naturalized 

 in America. (The genus is named after Princess Anna Paulowna, daughter of 

 Czar Paul I.) 



288. PAULOWNIA TOMENTOSA, BAILEY. 

 PAULOWNIA. PRINCESS-TREE. 



Ger., Princessinn-Baum; Fr., Arbre de princesse; Sp., Arbol de 



princesa. 



SPECIFIC CHARACTERS: See the ordinal and generic characters above, this 

 being the only well known species. 



The interesting Paulownia is a naturalized species in this country 

 and we can not yet tell how large the trees may grow here, but it 

 is occasionally seen with trunk 2 or 3 ft. (0.75 m.) in diameter. Its 

 habit of growth, however, is to develop a wide-spreading open top 

 of few large branches, and a tree with a trunk of the above dimensions 

 may not have a greater height than 30 or 40 ft. (12 m.). The bark 

 of trunk is very characteristic. It is quite smooth and of a brownish 

 gray color streaked irregularly lengthwise with paler color, where 

 it separates a little on the surface in process of growth, and it becomes 

 slightly roughened. 



HABITAT. The native land of the Paulownia is China and Japan 

 whence it has been introduced into this country for ornamental pur- 

 poses and it has been naturalized from about the latitude of New 

 York to Florida and Texas. 



