206 American Midland Naturalist Monograph No. 7 



3. Ruellia L. 



1. Stem hirsute; calyx-lobes linear-filiform, 0.5-1 mm wide, exceed- 

 ing the capsule; leaves nearly sessile; roadsides and open woods, 

 common throughout 111. June-Aug. [R. ciliosa of auth., not 



Pursh; R. caroliniensis of auth., not (Walt.) Steud.] 



....-/?. hurnilis Nutt. 



1. Stem glabrous or puberulent; leaves short-petioled. 



2. Calyx-lobes linear-lanceolate, 2-4 mm wide, about equalling the 

 capsule; flowers sessile or nearly so, or the peduncle 5-15 mm 

 long; alluvial soil throughout the state except the northern 



counties. June-Aug. Smooth Ruellia R. strrpens L. 



2. Calyx-lobes subulate-filiform, shorter than the capsule; flowers 

 on slender peduncles 2-10 cm long, bearing a pair of leaf-like 

 bracts at the apex; dry open woods, s. 111. June-Aug. Stalked 

 Ruellia R. pcdunculata Torr. 



111. Plantaginaceae Lindl. — Plantain Family 



1. Plantago L. — Plantain 

 1. Leaves basal; plant scapose. 



2. Leaves ovate, oval, lanceolate or spatulate, not linear. 



3. Leaves narrowed at the base; veins free to the base; scapes 

 solid. 

 4. Spikes cylindrical. 



5. Capsules 4- to 15-seeded; corolla-lobes spreading or re- 

 flexed in fruit; leaves ovate or oval; plants perennial. 

 6. Capsules 4-5 mm long; sepals elliptic, acutish, 2.5-3 

 mm long; seeds L5-2 mm long; leaves often glossy 

 green, the petioles usually purplish at base; waste 

 places, roadsides, lawns, fields, and open woods, 



very common. Jime-Sept. Common Plantain 



P. rugelii Dec. 



6. Capsules about 3 mm long; sepals oval, obtuse, 1.5-2 



mm long; seeds 0.6-1.2 mm long; leaves dull green; 

 waste places and lawns in cities, not common in 



111.; nat. from Eur. Broad-leaved Plantain 



...P. major L. 



5. Capsules 2- to 4-seeded, ellipsoid, 2-3 mm long; leaves 

 spatulate, obovate, or narrowly ovate. 



7. Corolla-lobes erect and closed over the tip of the cap- 



sule; flowers not fragrant; plants annual or bien- 

 nial; common in fields and on roadsides throughout 



111. May-July P. virginica L. 



7. Corolla-lobes spreading or reflexed; flowers fragrant; 

 plants perennial; adw from Eurasia. Cook Co., 

 G. D. Fuller & O. M. Shantz in 1940. Apr.-June 

 P. media L. 



