Hymeuoniyceke, Agaricaceje, Leucosporae, Russula. 133 



albo V. rubro maculato, aequali v. infra angnstato, solido, firmo, 

 juventute pruinoso, 4 6 cm. longo 1,5-3 cm. crassoj sporis ochraceis, 

 globosis y. snbglobosis, ecbinulatis 10 ^ 8,5. 



Eab. ad terram iu silvis, Tollaud Colorado, 2775 m. alt., Amer. 



bor. (L. O. OVERHOLTS). 



10. Russula vinacea Burlingh., North Am. Fl., IX, 4., p. 217 (1915).— 500 

 Pileo couvexo, centro leniter depresso usque 10 cm. lato ; super- 

 ficie viuosa, disco plus v. minus flavescenti, udo viscido, pellicula 

 disco excepto separabili, juventute pruinoso ; margine demum ar- 

 cuato et maturo striato-tuberculato, contextu firmiusculo, prope 

 cuticulam rubro, coeterum albo, acri ; lamellis albis, plus v. minus 

 praecipue tritis ferrugiueis, quandoque nonnullis parum intermixtis, 

 intus acutis et furcatis, extus rotundatis latis, intervenosis, sub- 

 confertis ; stipite albo v. maculis paucis ferrugineis praedito, ae- 

 quali, firmo, parum spugnoso, 4,5-6 cm. longo 1-2,5 cm. crasso ; 

 sporis albis, ellipsoideis, crasse echinulatis, 7-8,7*8-10. 



Rah. in silvis qnercinis et castanecolis, Cold Spring Harbor, 

 Long Island, New York, Amer. bor. (G. S. Burlingham). 



11. Russula eccentrica Peck, in N. Y. State Mus. BuII., 150., [1910] 501 

 p. 61 (1911). — Pileo carnoso, tenui, tirmo, excentrico vel defor- 

 mato, primitiis centro depresso, margine leve incurvato, deinde 

 subplauo, 5-10 cm. lato, sicco, glabro, brunueo vel brunneo-griseo, 

 siccitate leviter rufo-brunneo, carne alba, odore ingrato ; lamellis 

 tenuibus, subdistantibus, latis, adnatis vel adnexis, pallidis vel 

 subiucarnatis, rufescentibus ubi vulneratis, in aetate vel siccitate 

 rufo-brunneis et subpruinosis; stipite aequali, levi, intus sj)ongioso, 

 albo, 4-6 * 1,5-3 cm.; sporis subglobosis, sublevibus, 6-7 (x diam. 



Hab. \n quercetis prope St. Louis, Missouri, Amer. bor. (Glat- 

 felter) — E sectio Compactae, B. nigrimnti et R. densifoliae af- 

 finis. 



12. Russula aeruginosa Massee, in Bull. Bot. Gard. Kew, 1914, p. 73.— 502 

 Pileo explanato-expanso, ceutro subdepresso, caruoso, aeruginoso, 

 margiuem versus dilutiore, cute non difficile separanda, 8-10 cm. 

 lato ; lamellis latiusculis, confertis, aiitice rotuudatis, albidis ; sti- 

 pite levi, glabro, aequali, candido, 8-10 cm. longo, 0,8-1,2 miu. cr.; 

 sporis globosis, hyalinis, 6-7 {x diam. 



Hab. ad terram in horto bot. Singapore (Burkill) — B. oliva- 

 ceae affinis, sed lamellis confertis et cute facile separabili distincta. 



13. Russula COrinthil.rubra Burlingh., North Am. FI. IX, 4., p. 220 503 

 (1915). — Pileo demum plano v. centro leniter depresso, usque 9 



