NOTICES OF NOUTH AMERICAN FUNGI. 109 



floccis ramosissimis articulatis articulo ultimo elongate spiculifero ; 

 sporis obovatis. 



On rotten wood. Car. Inf. No. 2430. 



Pale tan-colouretl, much branched, the ultimate joints elongated 

 and covered with spicules ; spores obovate, apiculate below. 



663. Rhinottichum tenellum. B. ^ C— Album ; floccis primum 

 simplicibus apice clavatis spiculatis, dein proliferis; sporis oblongo- 

 ellipticis. 



On rotten onions. Car. Inf. No. 2322. 



White ; flocci at first erect, simple, with the terminal joints 

 elongated and covered with strong spicules, then proliferous ; 

 spores oblong, elliptic. 



664. Rhinotiichum cucumerinum. B. ^ C— Albidum ; floccis 

 inarticulatis primum simplicibus sursum clavatis granulato-spicu- 

 latis dein proliferis ; sporis obovatis. 



On stalks of Zea. Car. Sup. No. 4992. 



Dirty white ; flocci inarticulate erect, at first simple, clavate 

 above, rough with granules, then proliferous; spores obovate, 

 •0006--0005 long The spores are very different from those of the 

 last species. 



665. Rhinotiichum bxeve. B. <Sf C— Floccis brevibus apice vix 

 echinulato sporiferis ; sporis breviter fusiformibus medio tumidis ; 

 nucleo magno. 



On the under side of oak leaves. Querciis oUusiloba. Car. Inf. 

 No. 3002, 1728a. 



Flocci short, incrassated at the apex, with one or two nodules 

 or obscure spicules ; spores -0005 long, shortly fusiform, at first 

 lemon-shaped, swollen in the middle, with a large nucleus. 



666. Rhopalomyces cucurbitarum. B. & i?.— Hyalinus ; floccis 

 inarticulatis ; capitulis globosis echinulatis ; sporis obovatis 

 ovatisque. 



On putrid squashes. Car. Inf. Eavenel. No. 1864. 



Resembling at first sight a 3iucor ; threads hyaline, inarticulate ; 

 head globose, echinulate; spores obovate or ovate, attached to the 

 spicules ; sometimes a second spore occurs. 



667. Peronospora viticola. B. Sf C— Floccis candidis sursum 

 ramosissimis apicibus breviter emarginatis furcatisve ; sporis ovatis. 



On the under side of leaves of Vitis cestivalis. Santee River, 

 Ravenel. No. 1632. New England, Sprague. No. 5764. 

 Missouri, Dr. Engelmann. 



Forming orbicular white spots; flocci articulated, much branched 

 above ; the apices emarginate or shortly forked and acute ; spores 

 ovate. In those varieties where the leaves are woolly beneath the 

 spots are less conspicuous. 



* Pexonospoza infestans. il/o?t^.— Massachusetts, Russell. No. 

 6401. On potato leaves. 



