94 PHARMACAL PLANTS AND THEIR CULTURE. 



312. Diplacus glutinosus Wendl. Glutinous monkey flower. Scro- 

 phulariac&ce. 



313. Distichlis spicata Greene. Salt grass. Liliacece. 



Used in indigestion. Requires careful study as to its reputed prop- 

 erties. 



314. Drosera rotundifolia L. Sundew. Droseracece. 

 Introduced, found in conservatories and other places. This species, 



as well as D. longifolia L. and varieties, are said to be useful in 

 phthisis. Well known medicinally, though no longer officinal. Ap- 

 plied in the form of poultices to corns, bunions and warts. Used in 

 Italy to make a liquor called "rossoli." (Proc. A. Ph. A. 27: 225-227, 

 1879.) 



315. Dryopteris felix-mas (L.) Schott and D. marginale (L.) 

 Gray. Male ferns. Filicinece. 



These important drug plants, of which the rhizomes and stipes yield 

 the oleoresin (male fern oil) which is the most reliable remedy to 

 expel tapeworm. May readily be grown in moist shady places. 

 Whether they can be grown profitably remains to be determined. The 

 grower should also market and manufacture the oil, which is worth 

 thirty-five cents per ounce retail. The rhizomes are worth about 

 twenty-five cents per pound. 



316. Duboisia species. Solanacece. 



These plants are readily grown, and some of them should be more 

 carefully investigated as to chemical constituency and medicinal 

 properties. D. myoporoides is well known; contains duboisine, an 

 alkaloid identical with hyoscyamine. 



317. Duboisia myoporoides R. Solanacece. 



Grown in experimental gardens. Properties like those of bella- 

 donna and stramonium. Poisonous. (See 316.) 



318. Echinacea angustifolia D.C. Niggerhead. Composites. 



Said to be an antidote for rattlesnake bite, for blood poisoning, etc. 

 Highly spoken of by such authority as J. U. Lloyd. Used as a cancer 

 remedy and blood purifier. (Am. Journ. Pharm., 15-20, 1904.) 



This species is closely related to E. purpureum, known as black 

 Sampson. Both species are well worthy of more careful study as 

 regards their several reputed properties. Much used by the eclectics. 



319. Echinocactus cylindrica. Niggerhead. Hedgehog thistle. 

 Cactacece. 



The young shoots and seeds are eaten. Juicy, rich in water. 







