"204 PLANT NAMES AND SYNONYMS 



f. I. v^rna L. Pennsylvania to Georgia. Dwarf Iris, Slender 



Blue Flag. Root stock "pungently spicy". 



g. I. versicolor L. (I. Virginica L. not Muhl. ). Canada, south to 



Florida and west to Arkansas and Manitoba. Blue Flag, Flag 

 Lily, Liver Lily, Snake Lily, Poison Flag, Water Flag, Ame- 

 rican Fleur-de-lis or Flower-de-luce; Ger. Verschiedenfarbige 

 Schwertlilie, Amerikanischer Schwertel; Fr. Irisvarie, Flambe 

 variee, Glaieul bleu; Sp. Liria Americana. Rhizome, Blue Flag, 

 Iris U. S. P., cathartic, cholagoo:ue. 



1069. IRVINtJIA, Hook. Dika Bread. Simarubaceae. 



Named for Dr. Irving, R. N. Trees with curious annulated 

 branches. Three species, tropical west Africa, (a.) I. Barter! 

 H ook. f. is called Bread-tree, Dika Bread, Mango*. Seeds 

 edible. 



1070. ISANTHUS, Michx. False Pennyroyal, etc. Labiatae. 

 From Greek, '"equal" (i. e. regular) "flowered". Syn. 



Trichostema, in part. Annual herb. One species, Canada and 

 eastern U. S., False Pennyroyal, Fluxweed, Blue Gentian*. 



1071. ISATIS, L. - Woad. - Criiciferae. 



Ant'ient Greek plant name. Herbs, annual or biennial. 

 About 30 species, southern Europe and western Asia, 

 a. I. tinctoria L. Europe. Dyer's Woad (Wad, Ode, Goud), 

 Ash-of-Jerusalem. This species as well as (b) I. indi^otica 

 Fortune, of China yields indigo. 



1072. ISNARDIA, L. Marsh Purslane. Onagraceae. 



Named for A. D. Isnard, French botanist, d. 1724. Syn. 



Ludwigia, in part. Sue ulent herbs. About 4 species, N. 

 America; 3 in U. S. 



-a. I. paliistris L. (L. palustris Ell. ). Europe, Asia and N. Ame- 

 rica; U. S. throughout. Marsh Purslane, Water Purslane, 

 False Loose-strife, Phthisic-weed. Pkmt has been used in 

 asthma. 



1073. ISOCARPHA, R. Br. 1816. Isocarpha. Conipositae. 



From Gret-k, ''equal chafl", the bracts of involucre and re- 

 ceptable being similar. Syn. Dunantia, DC. 1836; Calea, in 

 part. Herbs related to Ageratum. About 5 species, tropical 

 America; 1 in U. S. 



1074. IS6C0MA, Nutt. Isocoma, Damiana*. Coinpositae. 



From Greek, ' equal hair". Syn. Aplopappus, Baccharis, 

 Bigelovin, Linoseris, in part. Suffrutescent plants with succu- 

 lent leaves and small rayless heads (yellow). Ten species in 

 southwestern U. S. 



-a. I. yeneta (H. B. K. ) Greene (Bac. veneta H. B. K., Big. ve- 

 neta Gray, L. Mexicana Schlecht., A. discoideus DC). Cali- 

 fornia to Mexico. One of the plants called Damiana. Plant re- 

 puted aphrodisiac. 



1076. IS6mERIS, Nutt. Isomeris. Capparidaceae. 



From Greek, "equal parts". A shrub of unpleasant odor, 

 with yellow flowers. One species, California. 



