110 PEOCEEDINGS OP THE AMERICAN ACADEMY 



Mountains. To these are to be added the eighteen species * of more 

 limited range upon the nuiinland, confined to Southern California or 

 Western Arizona ; very few of them, so far as their di.'?tribution is 

 known, belonging to Lower California or Mexico, and several of rare 

 occurrence. Among the latter is Crossosoma Californicum, known 

 previously only from the Island of Santa Catalina, in the Santa Bar- 

 bara Archipelago, of which genus the one other species is found in the 

 mountains of Western Arizona. Leptosyne gigantea and StenocJdoe 

 Callfornica were also known only from the same island, the latter the 

 only species of the genus ; the former belonging to a small genus con- 

 fined to Southern California and the region eastward to New Mexico. 

 It is evident, therefore, that, as regards the species common to the 

 island and the mainland, the flora may be said to be exclusively Cali- 

 fornian in its character. Not a single species is found that is peculiar 

 to Lower California or Mexico. The same alliance is nearly as prom- 

 inent if we look at the twenty-one new phtenogamous species of the 

 island. Fifteen of these (a Thysanocarpus, a Sphteralcea, a Lupinus, 

 a Trifolium, an (EnotJiera, a 3Iegarrliiza. a Galium, a Hemizonia, a 

 Perityle, a Bceria, a 3Iimuhis, a Pogogyne, a Calaminfha, a Phacelia, 

 and an Atriphx) all belong to genera largely or exclusively repre- 

 sented in California and the region east of it, and are mostly closely 

 allied to the species of that region. The remaining six species include 

 a Lavatera, a Composite, a Borraginaceous jilant, a species allied to the 

 Olive, and finally a palm. The Lacatera is interesting as represent- 

 ing a widely scattered genus, not otherwise found in America, except 

 as a second species occurs on the more northern island of Anacapa. 

 The genus belongs chiefly to the region of the Mediterrane^iu, where 

 fourteen species are native ; two others are confined to the Canary 

 Islands ; another has been discovered in Central Asia, and still another 

 in Australia. The new Composite is referred by Dr. Gray to a South 

 American genus (^Diplostephiuni), not otherwise represented in our 

 flora, but of which there are eighteen species in the Andes from the 

 eqnator southward. Of the Borraginaceous and Oleineous species. 

 Dr. Gray forms new genera; the one (Ilarpagonel/a) allied to the 

 small genus Pectocarya, of wliii-h there is one Chilian species, and 



* Crossosoma Californicum; Lepidium ^[enziesii And lasiocarpum ; Rhus laiiriiia ; 

 ITosackia ar<joplii/lla ; Lrptosi/ne gii/antea ; Filago Arizoiiica ; Peril i/le Emori/i ; Am- 

 bh/opappus pusillus ; ifaliicothrix Clevclaiidii ; Aniirrhinnm Niiltallianum and A. 

 spedosum : Lycium Californicum; Erilrichium aiicjuslifuli'um ; Pinus irisignis ; Cu- 

 pressus macrocarpa ; Muklenbergia debilis; StenocJUoe Californica. 



