SCROPHULARIACE^E. 263 



gent, 4 8 inches high, 4-angled, branching. Leaves nerved and marked with 

 pellucid dots. Flowers bright yellow, on axillary peduncles. 



Golden Hedge Hyssop. 



2. G, Virginica Linn. : stem assurgent, terete, pubescent above ; leaves 

 smooth, lanceolate, sparingly dentate-serrate, attenuate and connate at the 

 base ; segments of the calyx linear-lanceolate, equal ; sterile filaments nearly 

 wanting. 



Inundated meadows. Can. to Louis. W. to Oregon. July, Aug. 1\.. Stem 

 6 inches high, branched at base. Peduncles shorter or longer than the leaves ; 

 upper ones opposite. Flowers yellowish-white. A variable species. 



Common Hedge Hyssop. 



3. G. megalocarpa Ell. : leaves lanceolate, serrate, pubescent ; peduncles 

 opposite, longer than the leaves ; segments of the calyx linear, as long as 

 the globose capsule. G. acuminata Pursh. (excl. syn.} 



Ditches and pools. Penn. to Flor. July, Aug. 7J.. Flowers pale-yellow, 

 large. Capsule larger than in any other species. 



Large-fruited Hedge Hyssop. 



10. LINDERNIA. Linn. Lindernia. 

 (In honor of F. B. Von Lindern, a German botanist.) 



Calyx 5-parted, naked at base. Corolla tubular, ringent; 

 upper lip short, reflexed, emarginate ; lower one trifid, unequal. 

 Stamens 4, 2 longer forked and sterile. Stigma emarginate. 

 Capsule ovoid-oblong, 2-celled, 2-valved; dissepiment parallel 

 with the valves. 



1. L. dilatata Muhl. : leaves ovate or oblong, dilated at the base, clasping, 

 remotely toothed ; peduncles longer than the leaves. L. Pyxidaria Pursh. 

 Gratiola anagalloidea Mich. 



Inundated banks. Can. to Car. W. to Miss. July, Aug. (J).Stem 6 

 inches high, erect or assurgent, 4-sided, smooth, often much branched. Leaves 

 61 lines long. Flowers pale-purple, on alternate and opposite peduncles. 



Long-stalked Lindernia. 



2. L. attenuata Muhl. : leaves lanceolate and obovate, serrate-toothed, 

 narrowed at the base ; peduncles shorter than the leaves, erect. L. Pyx- 

 idaria var. major Pursh. 



Inundated banks. Can. to Car. July Sept. . Stem erect or assurgent, 

 branched, stouter than in the preceding. Peduncles mostly shorter than the 

 leaves. Short-stalked Lindernia. 



3. L. monticola Nutt. : stem slender, dichotomous ; radical leaves spatu- 

 late ; cauline ones linear, small and remote ; peduncles very long, at length 

 deflected. 



White hills, N.H. ? June. '4-. Stem erect, 46 inches high. Radical 

 leaves obscurely toothed, punctate ; cauline ones very few. Flowers pale-blue. 



Mountain Lindernia. 



11. HEMIANTHUS. Nutt. Hemianthus. 



(From the Greek i}/ii, (for fyiiew,) half, and ai/0o?, a, flower; on account of the 

 form of the flower.) 



Calyx tubular, cleft on the under side ; border 4-toothed. 

 Corolla with the upper lip obsolete ; the lower 3-parted ; inter- 



