ON CALLITRICHE POLYMORPHA AS A BRITISH PLANT. 233 



sometimes twigs, at other times carved in wood ; the Peziza are 

 generally of sheet-iron, zinc or lead. The pilei of nearly all the larger 

 fungi are metal, probably zinc, filled in with pipe-clay; the gills are 

 sometimes of sheet-iron, at other times of card or even paper ; some 

 of the veils are of wash-leather, others of gold-beater's skin. Some 

 "models" are undoubtedly the real fungi themselves, dipped in 

 some hardening solution and then painted ; this is shown by the 

 exquisite fineness, closeness, and regularity of the gills in some of 

 the specimens, a fineness, thinness, and regularity only seen in 

 nature. In other examples, as Agaricus velutipes, the gills are dis- 

 pensed with altogether, a mere flat surface being made to do 

 service for them. In Agaricus {Volvaria) volvaceus Sowerby shows 

 one example, with an ample ring to the stem ; this is curious, for 

 according to the sub-generic characters of Volvaria, no species 

 should have a ring. The model (if according to nature, as it pro- 

 bably is) shows that Volvaria. like its analogue Amanita, may 

 produce both ringed and ringless forms. In all, two hundred and 

 fifty-five models are now exhibited. 



ON CALLITRICHE POLYMORPHA Lonnrotii AS A 



BEITISH PLANT. 

 By W. H. Beeby, A.L.S. 



The distribution of this species as it is given in Nyman's 

 'Conspectus' stands thus: — "Suec. Norv. (&c.)."* This mode of 

 citation seems to indicate an opinion that the plant had likely been 

 overlooked elsewhere, rather than that it was really confined to the 

 two countries specially named. If this view be correct, its occur- 

 rence in Surrey would not be very remarkable, and several 

 (imperfect) gatherings made in this county have been considered 

 by Dr. Hjalmar Nilsson as probably referable to it. Last year, 

 however, I gathered in the Island of Unst, Shetland, a plant 

 which was definitely named 6. pok/morpha Lonnr. by Dr. Nilsson, 

 as recorded in the « Scott. Naturalist ' for last January. Thus the 

 plant may reasonably be searched for throughout the greater part 

 of the kingdom, and a few remarks on its distinctive features may 



therefore be useful. 



CalUtrkhe poh/morpha was first described by C. J. Lonnroth in 

 a small tract entitled 'Observ. crit. plantas suec. illustrantes, 

 printed on his inauguration to his degree at Upsala m 1854. Ihe 

 name seems to have escaped the notice of Hegelmaier, as I cannot 

 find that it is mentioned in his ■ Monograph,' although tins is 

 published ten years later (1864). Lonnrotii afterwards published 

 Bot. Notiser,' 18(57) a paper on the Swedish species of Call it rich?, 

 illustrated by excellent drawings of the various stages of flower 

 and fruit, &c This paper I have not seen, but I possess a careful 



Greenland may be added, fide E. Warming in "Beretn. om den bot. 

 expedit. med. 'Fylla' i 1884 * (Copenhagen, l«»v). 



