1921] Pennell, — "Veronica" in North and South America 9 



Corolla mostly 4-6 mm. long. Ped- 

 icels mostly 2-5 mm. long. 

 Leaf-blades mostly oblong-ov- 

 ate, rarely evidently serrate. .9. V. Wormskjoldii. 

 C\ Capsule obviously wider than long, notched one- 

 fourth length. Corolla white or bluish, with 

 deep-blue lines on the posterior side, the tube 

 pubescent within. Style nearly as long as the 

 capsule. Leaf-Dlades ovate-oblong or oval, 

 obtuse, obscurely crenate. Stems extensively 

 repent, ascending at apex. 

 Stem throughout and pedicels minutely pubes- 

 cent with upcurved hairs. Corolla about 

 2 mm. long, white or whitish, with blue 

 lines on posterior side. Capsule mostly 



3-4 mm. wide 10. V. serpyllifolia. 



Stem distally and pedicels finely pubescent with 

 longer mostly spreading hairs. Larger 

 throughout, the corolla mostly about 3 mm. 

 long, pale-bluish with deeper blue lines on 

 posterior side. Capsule mostly 4-5 mm. 



wide 10a. V. serpyllifolia humifusa. 



A'. Annuals, fibrous-rooted, but without subterranean 

 stems. Most leaf-axils flower-bearing, so that 

 inflorescence appears to be of "axillary" flowers. 

 B. Pedicels shorter than the lanceolate to linear sepals. 

 Capsule strongly flattened. Seeds many, less 

 than 1 mm. long, flat, smooth or nearly so. 

 ' Plants erect. 

 Leaf-blades, excepting the lowermost, sessile, 

 those of the lower stem-leaves oblanceolate, 

 nearly entire to dentate. Corolla whitish 

 throughout. Capsule greenish, notched, the 

 minute style hidden between the capsule- 

 lobes. Plant glabrous or with minute usu- 

 ally gland-tipped hairs. 



Plant glabrous 11. V. peregrina. 



Plant pubescent with short gland-tipped hairs, 

 which are usually present even on the cap- 

 sule 11a. V. peregrina xalapensis. 



Leaf-blades petioled, or the upper nearly sessile, 

 those of the lower stem-leaves ovate, crenatc- 

 serrate. Corolla deep violet-blue. Capsule 

 yellowish-brown, pubescent with slightly 

 gland-tipped hairs, strongly flattened, notched 

 nearly or about one-third length, the longer 

 style reaching about to the capsule-lobes. 

 Plant pubescent with white glandless or ob- 

 scurely gland-tipped hairs 12. V. arvensis. 



B'. Pedicels longer than the ovate sepals. Capsule rela- 

 tively turgid. Seeds few, 1.3-3 mm. long, con- 

 vex-arched, roughened. Plants repent. 

 Leaf -blades ovate, serrate to dentate. Sepals 

 shortly ciliate. Capsule slightly flattened, 

 deeply notched, pubescent. Seeds 1.3-1.5 

 mm. long, brown. 

 Capsule-lobes united at least two-thirds their 

 length. Leaf-blades dentate, truncate or 

 cordate at base. Stem finely pubescent 

 with glandless hairs. 



