218 THE JOURNAL OP BOTANY 



spores approach those of a Scptoria or a Rhabdospora (such as 

 B. calcitrapai Sacc), but are distinctly tinged with olivaceous, 

 especially when seen in mass. The Hendersonia was accompanied 

 by I'leospora lierbarwn, Phoma lierharum f. Dipsaci Sacc. (sp. 

 eguttulate, 8-9 x 3-4 /x), and by other imperfect fungi, including 

 a Leptothyriuvi with Phoma-like spores. 



237. Hendersonia tenella Schrot. Pilz. Labrador, p. 19. 

 Sacc. Syll. x, 325. 



Pycnidia caulicolous, subepidermal, spherical or oblong, 

 200-250 /x diam., black, surrounded by a few dark-olive septate 

 creeping fibres, pierced by a pore, above which the epidermis is 

 split ; texture membranaceous, rather soft, parenchymatous. 

 Spores fusoid-cylindrical, rounded but tapering slightly at one end, 

 if not at both, sometimes shghtly curved, rather pale brownish- 

 olive, 3-septate, 20-25 x 3-4^ /x. (Tab. 543, fig. 3.) 



On old rotting stems of Saponaria officinalis, Hartlebury 

 Common, May. It was accompanied by Phoma herbarum on the 

 stems and Pleospora herbarum on the leaves. 



238. Camarosporium rubicolum Sacc. Syll. iii, 462. 

 Pycnidia scattered, globose, covered, but prominent, then 



erumpent, black, about 250-300 /x diam. Spores very numerous, 

 oblong-ellipsoid, sometimes obovoid, occasionally curved or sub- 

 angular, rounded at the ends, brown, usually 3-septate, with 1-3 

 cells longitudinally divided, not constricted, 16-22 x 6-7 /x, some- 

 times irregular and even 8 /x wide. (Tab. 543, fig. 6.) 



On stems of Bubus, Shustoke, April, 1888. On young 

 sarmenta of Biibus discolor, Hereford, March, 1914. 



The spores are at first hyaline and oval, 10 /x long or less ; 

 soon they become coloured olivaceous-brown, and 1-septate in the 

 middle, then 3-septate, and at length dark-brown and muriform. 

 An occasional spore may have more than three, even six, transverse 

 septa. In the not quite mature 3-septate condition this might 

 easily be called H. rubi Westd., but the spores are not subacute 

 at the base, nor is the lowest loculus paler than the others. 



239. CoLLETOTRiCHUM LiNEOLA Corda, in Sturm, Deutsch. 

 Cr. Flor. iii, 3, p. 41, pi. 21. Sacc. Syll. iii, 736. 



Bristles at times in rows, at others aggregated into a false 

 appearance of a conceptacle, cuspidate, smoky-brown, paler 

 upwards, 60 x 3. Spores fusoid, arcuate, acute at each end, 

 especially above, 3-guttulate, 25-28 x 3^-4 /x, arising at the base 

 of the bristles on very short sporophores. (Tab. 543, fig. 10 b.) 



On sheaths and culms of Vactylis, Olton, June. In my speci- 

 men the spores measured 22-27 x 2^-3 /x. 



Var Phragmitis var. n. Sporulis brevioribus, amplioribus. 



Forming numerous small crowded black spots, which are 

 caused by the epidermal cells being crammed full of a mass of 

 rather large pale- brown oblong or oval cells, not arranged distinctly 

 as liyphsB (^. e. pseudoparenchymatous). Later there arises on 

 this a circle of bristle-like erect hyphse, which are olive-brown or 

 dark-brown, paler upwards, curved, rather pointed, continuous, 



