SCIENTIFIC AND POPULAR. 139 



697. DOREMA, D. Don. Ammoniac plant. Umbelliferae. 



From Cxreek, *'gift". Syn. Peucedanum, in part. Herbs. 

 About 5 species, west-central Asia. 



a. D. Ammoiiiaeum Don. (P. Ammoniacum H. Br.). Persia. 



Gum-7^esi)tous exudate of this and perhaps other species; Am- 

 moniacum, U. S. P., Br.; Gummi-resina ammoniacum, Gum 

 Ammoniac; Ger. Ammoniak-gummi; Fr. Gomme ammoniaque 

 (Codex); stimulant, expectorant, antispasmodic, rubefacient. 



b. D. Aiiclieri Bois. Western Persia. Zuh of the Kurds, Yields 



also gum ammoniac. [From (c) 1), robiistum Loftus, a 

 different gum is produced]. 



698. DORSTENIA, L. Contrayerva. Artocarpaceae. 



Named for T. Dorsten, German botanist, d. 1552. Herbs. 

 About 40 species, tropical America. 



a. D. Brasilieiisis Lam. West Indies, Central America, south to 

 Peru; (b) 1). Contrayerva L. Brazil. Boot of both is known 

 as Contrayerva (i. e. antidotal remedy); Ger. Bezoarwurzel, 

 Giftwurzel; Fr. Contrayerve; stimulant tonic, antidote to snake 

 poison; (c) D. Drakena L., (d) 1). Cayapia Veil. (D. 

 opifera Mart. ) and (e) 1). tubicJiia R. & P., yield similar 

 roots. 



699. DORYPHORA, Endl. Sassafras tree. Moiiimiaceae. 



From Greek, "spice bearing". Syn. Doratophora, Lem. 

 An aromatic tree. One species, Australia. See Atherosperma. 



a. D. Sassafras Endl. Australia. Sassafras tree. Leaves and 

 6a?7>; have anise- like odor, carminative. 



700. pOUGLASIA, Lindl. Douglasia. Primiilaceae. 



Named for David Douglas, botanical explorer. Herbs. 

 About 5 species, one in Europe; 4 in northwestern U. S. 



701. DOVYALIS, E. Meyer. Kei Apple. Bixaceae. 

 Syn. Aberia, in part. Shrubs or trees. About 10 species, 



southern and western Africa. 



a. D. Caffra (Harv. & Sond.) Lyons (Aberia Caffra Harv. & Sond. ). 

 Southern Africa. Kei Apple, Kai Apple. Fruit acid, used 

 for pickles and preserves. 



702. DRABA, L. Whitlow-grass, Nailwort. Crueiferae. 



The Greek name of a Lepidium. Tufted herbs. About 150 

 species, north temperate and arctic regions and S. America; 4ii 

 in U. S. See Erophila. 



708. DRACAENA, L. (Drakaina). Dragon tree. Liliaceae. 

 Shrubby or arborescent plants. Syn. Draco, in part. About 

 50 species, warmer regions. Old World. 



a. D. Draco L. (Draco dragonalis Crantz). Canary Islands. 

 Dragon Tree. Exudate is a, variety of Dragon's-blood, [(b) 

 D. Ombet Kotschy, of Socotra, yields a similar product, brought 

 to Arabia uuder the name of Katir.] 



