490 Angewandte Botanik. 



disorders of the bronchia, larynx, and breast; officially it is known 

 under the names "Capillaire du Canada", and "Herba Adianti Ca- 

 nadensis". Adianthuyn pedatiini occurs in rieh, moist woods from 

 New England to Missouri and Virginia, besides in Canada 

 (Nova Scotia west to British Columbia), in Alaska foUowing 

 the coast southward to California. The anatomy of the vegetative 

 Organs is described, and the following points may be mentioned. In 

 the rhizome the cortex is thickwalled, and filled with starch, but 

 parenchymatic throughout; endodermis is thinwalled, and circular 

 in crosssections bordering on about three strata of very thinwalled 

 tissue, the cells of which correspond with those of endodermis, being 

 derived from the same primordial laj^er as this; it contains starch, 

 and the cells are not suberized. Troschel called this tissue "Amy- 

 lom". Inside the amylome follows a circular zone of leptome, thcn 

 again some strata of amylome encircling the tracheids. Inside the 

 hadrome occurs another circular band of leptome with a covering 

 of amylome, and surrounded by an inner endodermis; then follows 

 the innermost, the central, portion of the stele, occupied b}^ a ver}?- 

 thick-walled, but truly parenchymatic pith. The stele of Adianthmn 

 thus compares well with that of Marsilia, described by Russow. 

 The Stele of the petiole, examined beneath the first bifurcation, is 

 reniform in outline, when viewed in cross-section, and has no pith. 

 The leaf-blade is very thin, with the stomata confined to the dorsal 

 face, the chlorench3^ma is very open, consisting merety of two 

 strata of roundish or oblong cells, but there are no palisades. Ste- 

 reome occurs only along the margins of the blade. Characteristic of 

 the veins is the development of two very distinctsheaths, of which the 

 outer one corresponds with a typical parench^^ma-sheath, containing 

 Chlorophyll, while the inner sheath represents an endodermis. These 

 mestome- Strands of the leaf-blade are collateral. Theo Holm. 



Holm, T., Medicinal plants of North America. 26. Collin- 

 sonia Caundensis L. fMerck's Report. XVIII. p. 87—90. fig. 1—8. 

 April 1909.) 



Collinsonia was long ago employed by the Indians as a remed}' 

 for sores and wounds; in the mountains of Virginia, Kentucky, 

 Tennessee, and Carolina it is considered as a panacea, and is 

 used externally and internally in various disorders. The whole plant 

 is used, both fresh and dry, and has a strong, rather unpleasant 

 odor, and a warm, pungent taste. The species is a perennial herb 

 with a thick, knotty, depressed root-stock of a dark brown color, 

 with numerous slender but strong roots. Verj^ characteristic is the 

 inflorescence, which resembles a large, open panicle with the floral 

 bracts very small; the greenish yellow corolla has the inferior lip 

 beautifully fringed. The species is common in rieh woods from 

 Canada to Wisconsin, and south to Florida. The seedling 

 reminds of Scrophiilaria nodosa, and shows the same swelling of 

 the hypocot3'l and the cotyledonary buds. The internal structure is 

 described, and shows some points of interest. Although the roots 

 (the secondary) may remain active for several seasons, they never- 

 theless do not increase in thickness beyond the development of a 

 few additional vessels; a pith occupies the center of the stele, which 

 frequently is tetrarch, and of which the hadromatic rays are 

 remarkably short. A somewhat peculiar structure is possessed by 



