264 SCROPHULARIACEJE. 



mediate segment ligulate and truncate, much longer, closely in- 

 curved. Stamens 2. Filaments bifid, lateral fork antheriferous. 

 Style bifid. Capsule 1 -celled, 2-valved, many -seeded. 

 H. micranthemoides Nult. Herpestis micrantha Pursh, (excl. syn.) 

 Inundated banks. Penn. to Virg. Aug., Sept. OP- Stem creeping, dichoto 

 mous. Leaves opposite, crowded, sessile, obscurely 3-nerved. Flowers white, 

 minute, solitary, axillary. Hemianthus. 



SUBORDER II. RHINANTHIDE^. 



Inflorescence entirely centripetal or compound. ^Estivation 

 irregularly imbricated, one of the lateral segments being gen- 

 erally external, while the two upper are always internal. 



I. SlBTHORPEJE. 



12. LIMOSELLA. Linn Mudwort. 



(From the Latin limus, mud ; in allusion to its place of growth.) 

 Calyx 5-cleft. Corolla shortly campanulate, 5-cleft, equal. 

 Stamens 4, approximating by pairs. Capsule 2-valved, sub- 

 bilocular, many- seeded. 



L. subulata Ives : leaves linear, very narrow, scarcely dilated at the apex ; 

 scape 1 -flowered, as long as the leaves. L. tenuifolia Nutt. 



Muddy shores. N. Y. and Penn. Aug. 1\. Plant rooting and creeping in 

 the mud. Leaves about an inch long. Flowers bluish-white, minute, on pedun- 

 cles a little longer than the leaves. Common Mudwort. 



II. VERONICE.E. 



13. VERONICA. Linn. Speedwell. 



(Name of doubtful origin.) 



Calyx 4- rarely 5-parted. Corolla rotate, unequally 4-lobed ; 

 the lower segment narrower. Stamens 2, inserted into the 

 tube, exserted. Capsule 2 -celled, mostly emarginate or obtuse. 

 Seeds few. 



* Spikes or racemes terminal. 



1. V. serpyllifolia Linn. : stem ascending; leaves broadly ovate or ellip- 

 tic, slightly crenate, smoothish ; raceme elongated, many-flowered ; cap- 

 sule inversely reniform, as long as the style. 



Meadows, &c. Throughout the U. S. May Aug. Ij.. Stem procumbent, 

 3 8 inches long, sometimes creeping. Flowers small, pale blue, in a long spike 

 or raceme. Introduced from Europe. Thyme-leaved Speedwell. 



** Spikes or racemes axillary. 



2. V. scutettata Linn. : stem slender, nearly erect ; leaves linear or lance- 

 linear, sessile, somewhat toothed; racemes lateral, alternate; pedicels 

 divaricate in fruit. 



