I.WOPERDACEAE 77 



size. Gleba pale olivaceous then darker olivaceous brown at maturity, varying con- 

 siderably in color in different collections. It may be Isabella color (nearly old gold) or 

 Brussel's brown with a faint tint of purple or rarely a distinct purplish brown. 



Spores (of No. 679) very small, spherical, about the color of the mature gleba, 

 3.7-4.5/1 thick and with a short pedicel, minutely asperulate; after soaking in water 

 appearing to have a thick, hyaline wall, the spines showing as darker strialions in the 

 hyaline material. Capillitium threads more or less uneven, with numerous or scattered 

 distinct pits in the walls, frequently branched, tapering to a point, averaging about 

 3.9-4.3ju in the larger threads, in places rarely up to 7/i thick. 



Our collections have been compared with a good plant of L. umbrinum from Bresa- 

 dola's herbarium (labelled L. hirtum). The spinules on the top of this specimen are 

 somewhat larger than on any American plant we have seen, but otherwise the differ- 

 ences are trivial The spores are minutely but distinctly warted, 4-5.5/1, rarely with a 

 mucro; capillitium threads knobbed and strongly pitted. Our plants also agree well 

 with descriptions of L. glabellum by Peck and Morgan except that the spore color is 

 given as purplish brown and the spores as described are too large. However, we have 

 examined a plant from the type locality (West Albany), collected by Peck and possibly a 

 part of the type, and find that it agrees in these spore details and not with published 

 descriptions. Peck gives the spores as purplish brown, 5.1-6.3/x thick, but in his plant 

 we find them to be brown with little or no purplish tint and 4-4.8/1 thick, including warts. 

 Peck's specimen agrees further in showing the distinct pits in the capillitium, a character 

 that we find most useful in determining this species. The threads are also of the same 

 thickness and irregularity, up to 4.2/1 thick. 



We cannot find any good difference between the present species and L. Turneri 

 as treated by Morgan (1. c, p. 17) and Lloyd (Myc. Notes, p. 236). The original 

 description of L. Tumcri E. & E. (Journ. Myc. 1: 87. 1885) was unfortunately 

 based on two different lots of plants, one, the true type from Labrador, and another 

 smaller and different plant from the eastern United States. This last we cannot dis- 

 tinguish from L. glabellum. The type from Labrador is represented in the New York 

 Botanical Garden and is a larger plant with much larger and rougher spores and with 

 the capillitium threads unpitted (see pi. 113, figs. 4 and 5). One supposed difference 

 between L. glabellum and L. Turneri is the purplish spores of the former, but this does 

 not hold, as most specimens of L. glabellum found in herbaria, including some of Peck's 

 own, as stated above, have brown to olivaceous gleba. 



Lloyd considers L. glabellum a synonym of L. umbrinum (Myc. Notes, p. 225), 

 while Hollos treats it as a variety. The species is treated as L. glabellum by Morgan 

 (1. c, 14: 10). Lloyd thinks that L. elegans Morgan is the same. This is the plant 

 determined by Ellis as L. molle Pers., and Lloyd also considers the latter the same as 

 L. glabellum (Myc. Notes, p. 209). In a plant of L. molle from the Persoon Herbarium, 

 now at the New York Botanical Garden, the gleba is Isabella color and the spores 

 3.4-3. Sfi thick, faintly warted to smooth, smaller and less rough than in American 

 L. umbrinum (pi. 113, fig. 6). 



Illustrations: Fries, Th. C. E. Sverigcs Gasteromyceter, fig. IS. 

 Hollos. 1. c, pi. 18, figs. 23-29; pi. 29, fig. 5. 

 Lloyd. Myc. Works, pis. 43 and 58. 

 Morgan. Journ. Cin. Soc. Xat. Hist. 14: pi. 1, fig. 7. 



