FLORA OF THE DISTRICT OF COLUMBIA. 157 



2. AQTIILEGIA L. 



1. Aquilegia canadensis I.. Columbine. 



Cliffs and rocky woods, chiefly along the upper Potomac; common. Apr .-May. 

 Eastern N. Amer. 



The columbine most commonly cultivated in gardens is an Old World species, 

 Aquilegia vulgaris L. 



3. DELPHINIUM T,. Larkspur. 



Plants annual; stem leaves mostly sessile or nearly so, the lobes 1 mm. wide or nar- 

 rower; fruit a single pod 1. D, ajacls. 



Plants perennial, with tuberous roots; stem leaves long-pet;oled, the lobes broad; 

 2 mm. wide or often much wider; fruit of 3 pods 2. D. tricorne . 



1. Delphinium ajacis L. ,, Rocket larkspur. 

 Fields and waste ground; occasional. June-Aug. Native of Eur.; widely 



adventive in N. Amer. (D. consolida of Ward's Flora.) 

 Flowers blue, pink, or white. 



2. Delphinium tricorne Michx. Dwarf larkspur. 

 Islands of the Potomac and at a few other places along the river; rare and now 



almost extinct. Apr.-May. Pa. to Ga. and westward.* 



4. ACONITUM L. 



1. Aconitum uncinatum L. Monkshood. 



Low woods and thickets; infrequent. Sept. Pa. to Ga. and westward. 

 A form with nearly white flowers has been found by Titus Hike. 



5. ANEMONE L. Anemone. 



Stem leaves not stalked; basal leaves simple, deeply lobed. Fruit pubescent with 

 straight hairs 1. A. canadensis. 



Stem leaves stalked; basal leaves compound. 

 Plants 30-60 cm. high or larger, very hairy, ynth thick erect rootstocks; sepals 



(petal-like) silky-haiiy outside 2. A. xdrginiana. 



Plants 10-20 cm. high, nearly glabrous, with very slender creeping rootstocks; sepals 

 glabrous 3. A. quinquefolia. 



1. Anemone canadensis L. 



Woods below Congress Heights, May, 1898 (Steele). Widely distributed in N. Amer. 



2. Anemone virginiana L. 



Woods and meadows, chiefly along the upper Potomac; frequent. June-Aug. 

 Eastern N. Amer. 



3. Anemone quinquefolia L. Wood anemone. 

 Woods; occasional. Apr.-May. Eastern N. Amer. (J., nemorosa of Ward's Flora.) 



6. HEPATICA Mill. 

 1. Hepatica americana Ker. Hepatica. 



Woods; common. Feb.-Apr. Eastern N. Amer. (Anemone hepatica of Ward's 

 Flora; H. hepatica and H. triloba of American authors.) 



One of the very earliest of spring flowers. Flowers bluish, pinkish, or nearly white. 

 The flowers are shown in plate 25 A. 



7. SYNDESMON Hoffmannsegg. 



l.'Syndesmon thalictroides (L.) Hoffmannsegg. Rue anemone. 



Woods; common. March-Apr. Eastern U. S. (TJialictrum anemonoides Michx.; 

 Anemonella thalictroides Spach.) 



Double-flowered plants occur occasionally. 



