152 THE JOURNAL OF BOTANY ~ 
= Hendersonia medicaginis Saccardo, Syll. Fung. ii. 88 (1883) ). 
Perithecia globose, black, rugulose, without a definite mouth, about 
150 p» diam., half buried in a dense weft of reddish or purplish 
mycelium (Rhizoctonia) ; spores exactly as in the ascigerous form, 
borne on short, slender, hyaline sporophores. 
On base of stem of lucerne, Medicago sativa L., Herne Bay. 
he fungus was found on lucerne sent to Kew by Mr. E. S. 
neces F.L.S., of Wye College, to illustrate the action of the 
parasit c fungus 1 aiciaeebaate alfalfe Magn. in producing “ crown 
gall” ab the collar 
eptospheria circinans Sace. is considered by most Continental 
mycologists as the fruit of the well-known brown or reddish-violet 
vegetative mycelium called Rhizoctonia sietaadl Py. Tulasne, which 
often proves so destructive to lucerne, saffron, potatoes, &c., cover- 
ing root or bulb with a dense felt of mycelium, which does 
not, as a rule, produce fruit until after the host-plant is on the 
wane or quite dead. In this condition Rhizoctonia is common 
throughout chp and is = known in the United cht 
Professor Rolfs (Colorado Agric. Bull. Nos. 70 and 91), on the 
other hand, potisidbrs that the: fruiting sonaltied of Bibactipnis 
violacea is a Basidiomycete, Corticiwm Pct Berk. & Curt. var. 
solani Burt. Now C. vagum proper is saprophytic on the dead 
bark of conifers, hence much latitude is necessary to enable the 
so-called variety solani to become a rampant parasite on the roots 
of a great number of different kinds of plants, growing in parts of 
the world where C. vagwm is unknown. The American C. vagum 
Berk. & Curt. var. solani Burt. is Hypochinus solani Prill. & Del. 
(see Siskin ng). 
UREDINACER. 
CINIA. CARDUI-PYCNOCEPHALI Sydow, Mon. cna i. 34, t. 3, 
fig. 35 “(1902) ; eri Syll. Fung. xvii. 291 (190 
Exsicc. Sacc. M yc. Ital. No. 1085. 
Uredospore sort hypophyllous, scattered, minute, pale brown 
not causing discoloured spots. Uvredospores globose or subglobose, 
very minutely echinulate, pale brown, 22-26 diam. Teleutospore 
On livi ving leaves and stem of Carduus pycnocephalus L. First 
observed in this country by Dr. Eng. Mayor, at Sidmouth, July, 
1907. During August of the same year I collected this s fungus i in 
abundance on the same host along the coast-line between East- 
bourne and Has 
Previously ae ornare ges Italy on C, ey ig sha L. 
ed agree well with the diagnosis given 
oe = whee other anes approach very closely to a second 
