44 THE JOURNAL OF BOTANY 



Collected by the late Isaa-c Carroll at Glenbower, Cork. It is 

 distinguished from allied species by the long slender spores. 



Microthelia dispora, sp. n. Thallus cinereo-albidus, fur- 

 furaceus, tenuis vel obsoletus. Peritliecia minuta, 0-150-200 mm. 

 diam., globosa, nitido-nigra, semi-immersa, vel subsessilia, sub- 

 integra ; paraphysibus gracilibus, ramosis, confertis ; ascis elon- 

 gato-clavatis, 0-065 mm. longis, 0-015 mm. latis ; sporis binis, 

 oblongis, fuscis, majusculis, 1-septatis, 0-025-35 mm. longis, 

 0-010-12 mm. latis. 



Ad saxa calcarea. 



Apt to be confused with Arthojnjrenia saxicola, under which 

 species it had been classified by the late W. Joshua, who collected 

 it at Sapperton, Gloucestershire. 



Porina Curnowii, sp. n. Thallus olivaceo-fuscus, tartareus, 

 tenuis, intequalis, continuus vel rimosus. Perithecia sparsa, minuta, 

 nigra, hemispherica, dimidiata, ad basim immersa, ostiolis minute 

 papillatis, baud prominulis, notata ; paraphysibus numerosis, gra- 

 cilibus; ascis cylindraceo-clavatis, 080 mm. longis, 0-007-8 mm. 

 latis ; sporis octonis, anguste fusiformibus, 7- vel pluri-septatis, 

 circa 0-052 mm. longis, 0-003 mm. latis. 



Ad saxa. 



Collected by the late W. Curnow on fragments of rock at 

 Penzance. It differs from P. lucens, to which it is closely allied, 

 by the size and form of perithecia and spores. 



Description of Plate 510. 



1. Lecidea pleiospora. Ascus and spores, x 550. 2. Gongylia viridis. 

 a, peiithecium, x 100; h, ascus and paraphyses, x 300; c, spore, x 550. 

 3. Microglcena Larbalestierii. a, ascus ; b, spores, x 550. 4. M. Holliana. 

 a, perithecium in section, x 100; b, ascus, x 120; c, spore, x 550. 5. Artho- 

 pyrenia areniseda. Ascus and two of the spores, x 550. 6. A. Crombiei. 

 a, ascus; b, spore, X 550. 7. Leptorhaphis Carrollii. a, ascus; b, spore, x 550, 

 8. Microthelia dispora. a, ascus and spores, x 550. 9. Porina Curnowii. 

 a, ascus and paraphyses, b, spore, x 550. 



THE PIMPEENELS. 

 By C. E. Moss, B.A., KSc. 



Mr. F. N. Williams, in the seventh part of his scholarly 

 Prodromus Flora Britannica (1910, 427, et seq.), gives a highly 

 interesting account of the British forms of the Pimpernel. To 

 the references he gives may be added the records of a blue 

 Pimpernel near Cambridge, by Eay (Cat. 1660, 11), by J. Martyn 

 (Meth. 1727, 71), by Eelhan (Flo. Cantab. 1785, 86), and by Babing- 

 ton (Flo. Camb. 1860, 190). Babington states that " most, if not 

 all, those gathered were blue-flowered A. arvensis." A blue Pim- 

 pernel still occurs in this locality ; but it is rare. Hind (Flo. Suff. 

 1889, 285) may be added to the authorities mentioned by Mr. 



