1921] Pennell, — "Veronica" in North and South America 



Calistachya virginica lanceolata Farwell in Mich. Acad. Sci. Rep. 

 17: 176. 1915. '"Farwell No. 1165, July 18, 1891, from Ypsilanti 

 [Michigan]." A narrow-leaved form. 



Veronicastrum virginicum (L.) Farwell, Drugg. Circ. 61: 231. 1917. 



Meadows and open woods, from Vermont, southern Ontario and 

 Minnesota to Georgia and eastern Texas. Southward forma mllosa 

 is more prevalent. 



Variable, but certainly one species. Varying in number of leaves 

 in whorl (five, four, rarely three, or in oppositifolia even two), in leaf- 

 form from lanceolate to nearly ovate, pubescent or nearly or quite 

 glabrous below (forma villosa with whole under surface velvety), in 

 inflorescence being of one or several racemes, and in color of corolla 

 and filaments, varying from white through pinkish to lighter shades 

 of violet-purple. 



II. VERONICA L., Subgenus 1. VERONICELLA (Fabr.) 



Veronicella [Heister] Fabr., Enum. Meth. PI. Hort. Helmstad. ed. 

 II. 205. 1765. Type species, Veronica hcdcracfolia L., of Europe. 

 A. Perennials, from subterranean stems (rootstocks) . 

 Only the upper leaf-axils flower-bearing, so that 

 inflorescence is formed of definite racemes. 

 B. Capsules only slightly flattened, even the lowermost 

 on pedicels shorter than the capsule-length: 

 inflorescence appearing a spike. Style two or 

 three times the length of the capsule. Leaf- 

 blades lanceolate. Plants 4-10 dm. tall. 

 Petals broadly oblong. Leaves opposite or in 

 threes, rarely in fours, 3-15 cm. long, the 

 blades acute to acuminate, dentate-serrate 

 to sharply and somewhat doubly serrate. 



Plant 4-10 dm. tall 1. V. maritima. 



Petals oblong-lanceolate. Leaves always oppo- 

 site, 3-6 cm. long, the blades acutish, crenate or 



crenately serrate. Plant 2-4 dm. tall 2. V. spicata. 



B'. Capsules strongly flattened, the lowermost on pedi- 

 cels nearly or quite as long as the capsule-length; 

 inflorescence obviously a raceme. Style slightly, 

 if at all, longer than the capsule. 

 C. Capsule as long as or longer than wide, less deeply 

 or not notched. Corolla violet-blue, rarely 

 nearly white, glabrous within. Leaf-blades 

 obtuse, acutish to acuminate. Stems erect, 

 nearly or quite from the base. 

 Calyx 5-parted, the posterior lobe over half the 

 length of the others. Leaf-blades lanceo- 

 late, acuminate, irregularly dentate. 



Plants 5-6 dm. tall 3. V. mexicana. 



Calyx 4-parted, or with a rudiment of the fifth 

 lobe. Leaf-blades ovate to oblanceolate, 

 obtuse to acutish, entire to serrate. Plants 

 less than 3 dm. tall. 



