SCIENTIFIC AND POPULAR 217 



h. L. Spica Cav. (L. lati folia Villars). Mediterranean region. 

 Spike Lavender, French Lavender, Great or Male Lavender, 

 Aspic; Fr. Lavande commune, Spic (Codex). Flowers richer 

 in oil but of less delicate aroma than those of (a) ; source of oil 

 of Spike 1^ essence d'aspicj. 



•e. L, Stoechas L. Mediterranean region. Arabian Lavender, 

 French Lavender*, Gentle or Topped Lavender, Cast-me-down, 

 Cassadong:}:, Stickadore. Properties of (b) ; an important honey 

 plant. 



1146. LAVATERA, L. Tree Mallow, etc. Malvaceae. 

 Named in honor of the two Lavaters, naturalists of Zurich. 



Herbs or small trees. About 40 species, widely distributed; 2 

 in U. S. (a) L. arborea L. Middle and southern Europe. 

 Tree Mallow, Sea Mallow, \'elvet-leaf. 



1147. LAVAIjfXIA, Spach. Primrose. Oiia^raceae. 



Named for Francois Delavaux of Nismes. Syn. Oenothera 

 (Kew), in part. Perennial herbs with white, pink or pale 

 yellow flowers. About 6 species, N. America; 4 in U. S. 



1148. LAWS6NI4, L. Henna plant. Lythraceae. 



Named for Dr. John Lawson, early in 18th Century. Shrub 

 with fragrant white flowers. One species. (a)L. inermisL. (L. 

 alba Lam. ( Kew), including L. spinosa L. j. Northern Africa, 

 southern Asia and Australia. Henna plant, Egyptian Privet, 

 Jamaica Mignonette, Flower-of-paradise, Alkhanna, Alcanna; 

 Fr. Henne. [See Alkanna]. Leaves yield an orange dye. 



1149. LEAVENW6RTHIA, Torr. Leaven worth ia. Cruciferae, 



Named for Dr. M. C Leavenworth, U. S. A. Syn. Cardam- 

 ine, in part. Annual sub-scapose herbs. About 4 species, 

 southeastern U. S. 



1150. LECANORA, Ach. Archil Lichen. Parmeliaceae. 



From Greek word for a "dish". 



a. L, esculenta Ach. Algiers to Tartary. Manna Lichen. Used 



for food in time of scarcity. 



b. L. Tartarea Achar. Northern Asia. Tartarean Moss, Canary 



Moss, Canary-weed, Cudweed*. From this and other lichens 

 is prepared litmus-, Lacmus, Lacca musica; Ger. Lakmus; Fr. 

 Tournesol, Laque bleu. Also from these lichens is made Archil 

 or Orchil; Fr. Orseille, and Cudbear; Ger. Persio; Fr. Orseille de 

 terre, all used for coloring. 



1161. LECHEA, L. - Pin-weed. - Cistaceae. 



Named for Johann Leche, Swedish botanist, d. 1764. Peren- 

 nial herbs, often sufli-utescent, with small leaves and flowers. 

 About 14 species, N. America and West Indies; 13 in U. S. 

 (a) L. villosa Ell. (L. major Michx., not Lin.). Ontario and 

 eastern U. S., west to Nebraska. Greater Pin-weed, Hairy 

 Pin- weed. Herb tonic, anti periodic, febrifuge. 



1152. LECYTHIS, Loefl. Monkey-pot tree. Lecythidaeeae. 



From Greek, "oil vase", alluding to the fruit. Large trees. 

 About 65 species, tropical S. America. 



