Pflanzenkrankheiten. — Lichenes. — Floristik etc. 631 



de la Teigne des Pommes de terre {Phtorinea operculella 

 Zett.). (C. R. Ac. Sc. Paris. CLIV. p. 84—86. 8 janvier 1912.) 



Commc aux Etats-Unis oü il attaque la Pomme de terre et le 

 Tabac, en Australie, en Nouvelle-Zelande, en Alg£rie et 

 en Portugal, le Phtorinea, observ6 accidentellement aux environs 

 de Paris par dejoannis, commence ä causer des degäts dans le 

 Midi de la France. II est cantonne sur le versant meYidional de 

 la chaine des Maures oü il tut apercu pour la premiere fois en 

 1902. La föcondite du Papillon est assez e4ev£e; un seul couple a 

 fourni 77 oeufs et les generations se succedent rapidement. Les 

 •oeufs sont pondus pour la plupart au niveau des yeux; les larves 

 minent les feuilles en ete. les tubercules rentr^s en hiver. Les 

 moisissures les suivent et donnent aux tubercules une odeur infecte. 

 Le sulfure de carbone est recommande comme remede efficace. 

 Toutes les precautions sont prises pour arreter l'extension de la 

 maladie. P. Vuillemin. 



Riddle, L. W., The North American species of Stereocaulon. 

 (Bot. Gaz. L. p. 285-304. 1910.) 



The species of this liehen genus fall naturally into two groups, 

 one a boreal group with Stereocaulon paschale the central species, 

 and the other a tropical group with S. ramulosum as the central 

 species. After a discussion of the synonomy concerned the author 

 gives a key to the nine species of the genus. Each species is then 

 described in detail and considerable additional data are added. Nine 

 figures illustrate some of the structural characters of the genus. 



R. L. Pool. 



Griffiths, D., The Grama Grass es. (Contr. U. S. Nat. Herb. XIV. 

 p. 343—428. pl. 67—83. textfig. 19—63. 1912.) 



The author includes under the title "Grama Grasses", not only 

 the genus Bouteloita to which the populär name has been usually 

 applied, but also the allied genera, Triaena H.B.K., Pentarrhaphis 

 H.B.K., and Cathestecum Presl. Each specific description is aecom- 

 panied by a füll synonymy, citation of herbarium speeimens, and 

 a text figure representing the details of the spikelet. The species 

 recognized are: Triaena juncea (Desv.) Griffiths (Triathera juncea 

 Desv. ; Triaena racemosa H.B.K.), Pentarrhaphis scabra H.B.K., P. 

 polymorpha (Fourn.) Griffiths (Atheropogou polymorphus Fourn., Pen- 

 tarrhaphis fourneriana Hack, and Scribn.), Cathestecum prostratum 

 Presl., C. multifidum Griffiths sp. nov. (type from Iguala, Mex. Sept. 

 9, 1909, coli. Griffiths), C. erectum Vasey and Hack., C. stoloniferum 

 (Fourn.) Griffiths [Atheropogou stolonifer Fourn.), Bouteloua procum- 

 bens (Durand) Griffiths (Chlovis procumbens Durand , Bouteloua pro- 

 strata Lag. , B. tenuis Griseb.), B. Simplex Lag., B. stolonifera Scribn., 

 B. scorpioides Lag., B. hirticulmis Scribn. ("hairy-culmed form of B. 

 hirsuta"), B. hirsuta Lag., B. gracilis (H.B.K.) Lag. (B. oligostaehya 

 Torr.), B. breviseta Vasey, B. raniosa Scribn., B. parryi (Fourn.) 

 Griffiths (Chondrosium parryi Fourn.; Bouteloua vestita Scribn.), B. 

 barbata Lag. (B. polystacha Torr.; B. microstaehya Dewey), ß. are- 

 nosa Vasey, B. trinii (Fourn.) Griffiths (Chondrosium trinii Fourn., 

 B. trifida Thurb. , B. burkii Scribn.), B. sonorae Griffiths sp. nov. 

 (type from Yaqui River in 1869, coli. Palmer), B. eriopoda Torr., B. 

 rothrockii Vasey, B. karwinskii (Fourn.) Griffiths (Chondrosium kar- 

 winskii Fourn.), B. alamosana Vasey, B. aristidoides (H.B.K.) Griseb. 



