FLOWERING PLANTS AND FERNS OF ARIZONA 823 



15. LIMOSELLA. Mudwobt 



Small, subscapose, glabrous or nearly glabrous annuals, with slender 



runners; leaves on long slender petioles, the blades entire, slightly 

 fleshy; flowers very small, solitary, on long slender peduncles, the 

 corolla white or purplish; style short, the stigma capitate; capsule 

 2-celled only at base; seeds many, cross-ribbed. 



A"' y to the species 



1. Leaf blades elliptic or oval, cuneate at base: corolla lobes acute, glabrous or 

 very nearly so; capsules obovoid; seeds much longer than wide. 



1. L. AQTJATICA. 



1. Leaf blades oblanceolate, attenuate at base: corolla lobes obtuse, puberulent; 

 capsules globose-ovoid: seeds little longer than wide__ 2. L. pubiflora. 



1. Limosella aquatica L., Sp. PL 631. 1753. 



Near Flagstaff, Coconino County. 7.500 feet (Lemmon in 1884), 

 wet soil, August. Almost throughout North America; Eurasia. 



2. Limosella pubiflora Pennell. Xottil. Nat. Acad. Nat. Sci. Phila. 43: 



7. 1940. 

 Known only from the type collection in the Chiricahua Mountains, 

 Cochise County (Peebles and Loomis 5420). 



16. VERONICA. « Speedwell 



Plants herbaceous, annual or perennial, terrestrial or aquatic; 

 leaves opposite or the upper alternate, sessile or short-petioled; 

 flowers small, slightly irregular, axillary, or in terminal racemes; 

 corolla rotate or broadly campanulate; capsule compressed, often 

 notched at apex. 



Ki y to the specii s 



1. Plants annual, glandular, puberulent, or short-pilose; flower- solitary in the 

 axils; capsules commonly wider than long (2). 

 2. Corolla whitish, shorter than the calyx, about 2 mm. wide: style very short, 

 not or scarcely surpassing the notch of the capsule: stems erect: leaves 

 alternate or the lower ones opposite, the blades oblong, linear, or oblance- 

 olate, entire or sparingly dentate; pedicels shorter than the subtending 

 leaves; capsules orbicular-obovate, the lobes not divergent. 



1. V. PEREGEIXA. 



2. Corolla blue, longer than the calyx, about 10 mm. wide: style slender, sur- 



passing the notch: stems decumbent or prostrate; leaves alternate, the 

 blades broadly ovate, coarsely crenate-dentate: pedicels much longer 

 than the subtending leaves; capsules broadly obeordate, the lobes 



divergent 2. V. persica. 



1. Plants perennial, with creeping rootstocks: flowers in racemes, the corolla blue 

 or bluish; style elongate, much surpassing the notch of the capsule (3). 



3. Racemes terminal: capsules flat, not orbicular; plants not aquatic (4 . 



4. Stems decumbent, much-branched at base, appressed-puberulent : lower 

 leaves opposite, short-petioled, the upper ones alternate, the blades 

 round-oval to oblong: racemes elongate, loose; corolla little surpass _ 

 the calyx; capsules wider than long, deeply notched. 



3. V. sfrpyllifolia. 



4. Stems erect, simple, these and the inflorescence villous: leaves opposite 

 except in the inflorescence, all sessile, the blades ovate to oblong; 

 racemes short, rather dense: corolla sky blue, much surpassing the 

 calyx; capsules much longer than wide, shallcjwly notched. 



4. V. WORMSKJOLDII. 



Reference: Pennell. Francis W. "vbbonh a" in north and south \mhrica. Rhodora - 

 29-41. 1921. 



