1216 CONTBIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Conanthus purpusii (T. S. Brandeg.) Standi. 



JJama purpusii T. S. Brandeg. Univ. Calif. Publ. Bot. 4: 186. 1911. 



Type from Movano, Coahuila. 



Plants suffrutescent, white-hirsute; leaves sessile, 2.5 cm. long or less, ob- 

 tuse ; sepals linear, 6 to 7 mm. long ; corolla bluish purple. 



145. BORAGINACEAE. Borage Family. 



Trees, shrubs, or herbs; leaves estipulate, entire or toothed, alternate or 

 rarely opposite; flowers perfect, regular, usually in cymes, the branches com- 

 monly scorpioid ; calyx inferior, usually persistent, tubular or campanulate ; 

 corolla gamopetalous, subrotate to funnelform or salverform, the limb com- 

 monly 5-lobate ; stamens as many as the corolla lobes and alternate with them, 

 inserted on the corolla; ovary normally of 2 2-ovulate carpels, sometimes 

 4-celled ; style entire or once or twice bifid ; fruit drupaceous or of 4 nutlets. 



Several genera are represented in Mexico only by herbaceous species. 



Style twice bifid 1. COEDIA. 



Style entire or once bifid. 

 Flowers in cymes, these usually paniculate. 



Calyx closed in bud, in anthesis valvate, 2 to 5-lobate 2. BOXTRRERIA. 



Calyx not closed in bud, 5-parted 3. EHBETIA. 



Flowers in scorpioid spikes or racemes, these often cymose, or the flowers 

 in terminal heads or solitary or clustered in the axils. 

 Flowers in terminal heads or solitary or clustered in the axils. 



4. COLDENIA. 

 Flowers in scorpioid spikes or racemes. 



Fruit drupaceous 5. TOURNEFORTTA. 



Fruit dry, separating into 2 or 4 nutlets 6. HELIOTROPIUM. 



1. CORDIA L. Sp. PI. 190. 1753. 



Trees or shrubs; leaves mostly alternate, entire or dentate; flowers In 

 cymes, heads, or spikes, small or large ; calyx tubular or campanulate, often 

 striate, 3 to 5-dentate; corolla funnelform, salverform, or campanulate, usually 

 4 to 6-lobate, sometimes with as many as 18 lobes ; style twice bifid ; fruit 

 drupaceous. ; 



The following vernacular names have been reported for plants of the 

 genus whose specific identity is uncertain: "Palo negro" (Ramirez); 

 '• cu^ramo " (Michoacfin) ; " candelero " (Tabasco); " rosadillo " (Oaxaca) ; 

 * rasca-viejo " ( Michoacfin ) . 



Calyx conspicuously 10-striate or sulcate. 

 Calyx 3 to 4 mm. long, campanulate. 



Corolla tube exserted 1. C. alba. 



Corolla tube not exserted 2. C. diversifolia. 



Calyx 5 mm. long or more, usually cylindric. 



Leaves finely stellate-pubescent beneath 3. C. alliodora. 



Leaves not stellate-pubescent. 

 Leaves 1 to 3 cm. long. 



Leaves entire 4. C. seleriana. 



Leaves coarsely dentate 5. C. greg'gii. 



