178 PLANT NAMES AND SYNONYMS 



915. ORAYIA, H. & Arn. (Graya). Grayia. Cheuopodiaceae. 



Named for Asa Gray, the distinguished American botanist. 

 Undershrubs. Two species, Colorado to California. 



916. GREENELLA, Gray. Greenella. Compositae. 



Named for Rev. Edward Lee Greene, the discoverer. Slen- 

 der low winter-annuals. Two species, Arizona. 



917. GREVILLEA, R. Br. Silk Oak, etc. Proteaceae. 



Named for R. K. Greville, English botani8t, d. 1866. In- 

 cludes the older genera Lysanthe and Stylurus of Salisbury. 

 Trees and shrubs. About 160 species, Australia and New Cale- 

 donia. 



a. G. robiista Cunningham. East Australia. Silk Oak, Silk-bark 

 Oak, Silky Oak. 



918. ORIN DELIA, Willd. Gum-plant, Tar- weed. Compositae. 



Named for Prof. H. Grindel of Riga, d. 1836. Syn. Donia, 

 in part. Herbaceous or suffruticose perennials with rather 

 large flower heads (yellow). About 35 species, western N. 

 and S. America; 25 in U. S. 



a. G. robiista Nutt. California. Grindelia, Gum-plant. Flower- 



ing tops of this and of (b); Grindelia. U. S. P.; balsamic, anti- 

 spasmodic, used for relief of dyspnoeia. 



b. G. squarrosa ( Pursh ) Dunal ( D. squarrosa Pursh). Central 



U. S. to Mexico. Broad leaved Gum-plant; (c) G. g^Iutiiiosa 

 Dunal, Mexico, nat. in California, Calancapatle de pueblo 

 (Mexico) and (d) G. hirsiitula H. & Am., Pacific coat>t of 

 U. S., have properties of (a). 



919. GUAJACUM, L. (Guaiacum). Guaiac. Zygophyllaceae. 

 From vernacular. West Indies. Trees with pinnate leaves 



and blue flowers. About 10 species, tropical America; 1 in 

 Florida. See Porliera. 



a. G. officinale L. (G. bijugura Stokes). West Indies and northern 

 S. America. Guallacan tree and (b) G. Sanctum L. (G. mul- 

 tijugum Stokes). West Indies, southern Florida and northern 

 S. A'uerica. Heart wood; Guaiaci Lignum. U. S. P., Br., 

 Lignum guajaci v. benedictum v. sanctum. Lignum vitse, 

 Guaiacum- wood, Guaiac- or Gaiac-wood, Pock-wood; Ger. 

 Ouajakholz, Pockholz, Franzosenholz; Fr. Bois de gayac (Co- 

 dex); Sp. Guayaco, Palo Santo; alterative, antiarthritic, 

 emmenagogue. 



920. GUARDIOLA, L. Guardiola. Compositae. 



Named for a Spanish botanist. Perennial herbs with white 

 flowers. Four species, Mexico and bordering territory; 1 in 

 U. S. 



921. GUAREA, Allem. 1771. Cocillana. Meliaceae. 

 Vernacular name. Cuba. Syn. Syncarpus, in part. Trees 



or shrubs with pinnate leaves. About 70 species, tropical 

 America and Africa. 



a. G. Riisbyi ( Brit. ) Rusby (S. Rusbyi Brit. ). Cocillana. Boot 

 has properties of Ipecac. 



