[Vol. 9 

 98 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



The west coast of the continent boasts of eight distinctive 

 species and three varieties. Of these, four species are especially 

 northern in character, occurring in Washington or farther north, 

 i. e., 7. Piperi, I. Flettii, I. occidentalis, I. truncata. Four are 

 either more extended to the south, as /. Nuttallii, I. Howellii, and 

 /. Bolanderi, or restricted to southern California, as /. Orcuttii. 



This last species even extends into Lower California, and 

 therefore, with /. mexicana and /. Pringlei, represents the genus 

 in Mexico. 



The West Indies yield two endemic forms, /. cubana (Cuba) 

 and /. Tuerckheimii (Haiti). 



Of the South American forms, three are reported for Brazil, 

 7. amazonica, I. Gardneriana, and 7. Martii. Three others, less 

 known in collections, occur in more remote stations, 7. Lechleri 

 (Argentine), 7. triquetra (Peru), and 7. Savatieri (Patagonia). 



The situation in Europe is somewhat parallel to that in North 

 America in that two species have a rather wide range in the 

 northern territory. 7. lacustris and 7. echinospora are found in 

 the British Isles and on the continent in the northern countries. 

 Aside from these, there are eight other forms on the continent 

 more local in distribution, and three in Mediterranean islands. 

 In France, we find 7. setacea, I. Boryana, I. tenuissima, I. histrix, 

 and 7. Brochoni; in Italy, the giant 7. Malinverniana; in Greece, 

 7. Heldreichii, and in Spain, 7. baetica (probably not a valid 

 species). In the Mediterranean islands, Corsica, Sardinia, or 

 Sicily, are reported 7. dubia, I. velata, and 7. tegulensis. I. 

 azorica is reported only from the Azores. 



To date, the genus appears much more sparse in Asia, with 

 7. olympica for Asia Minor, 7 coromandelina for India, and 7. 

 echinospora var. asiatica and 7. japonica for Japan. 



In Africa, Algeria shows especially marked abundance of forms 

 in that 7. histrix, I. Duriaei, I. adspersa, I. velata and its variety, 

 Perralderiana, all occur here. Farther south, 7. nigritiana has 

 been reported for the River Niger, and 7. Schweinfurthii in the 

 Anglo-Egyptian Sudan. In southern Africa, Angola gives us 7. 

 Welwitschii and 7. aequinoctialis. I. Wormaldii and the little- 

 known 7. natalensis, which may prove a valid species, are forms 

 from the Cape. 



