1922] 



PFEIFFER MONOGRAPH OF THE ISOETACEAE 129 



Herb.); Porto Vecchio, April and May, Reveliere (U. S. 



Nat. Herb, and N. Y. Bot. Gard. Herb.). 

 Phrygia: dry hills near village Kaiageul, S. of Ouchak, 30 May, 



1857, Balansa 849 (U. S. Nat. Herb.). 

 Crete: Crete, 12 March, 1882, Reverchon (Mo. Bot. Gard. Herb. 



and U. S. Nat. Herb.); Crete, ex herb. Ball (Gray Herb.). 

 Sardinia: Caprera I., granitic soil, 15 May, 1905, Vaccari 503 



(Gray Herb.) ; Bancamino, 3 June, 1881, Reverchon (N. Y. 



Bot. Gard. Herb.). 

 Italy: Castagnolo, 3 May, 1865, Caruel (Mo. Bot. Gard. Herb.); 



wet fields, Castagnolo, Pisa, 28 November, 1862, Ball (Gray 



Herb.). 

 France: Isle d'Yeu, Vendee, May, 1880, Grand-Marais (N. Y. 



Bot. Gard. Herb.) ; near the sea coast on Isle d'Yeu, Vendee, 



May, 1883, Grand-Marais (Mo. Bot. Gard. Herb.); "mare 



de Rochaute," near Agde, 5 October, 1846, Fabre (Gray 



Herb.); He de Houat, Morbihan, April, 1853, Lloyd 198 



(N. Y. Bot. Gard. Herb.). 



25a. Forma subinermis Dur. Bull. Soc. Bot. Fr. 8: 164. 1861. 

 I. histrix f. desquamata A. Br. Monatsber. K. Akad. Wiss. 

 Berlin, 617. 1864. 



/. hystrix Wolsey, New Phytol. II. 5 : 45. 1861. 

 Cephaloceratodon gymnocarpum Genn. Comment. Critt. Ital. 

 (3): 113. 1862. 



/. histrix var. scutellata A. Br. ace. Motel. & Vendr. Actes Soc. 

 Linn. Bord. 36: 400. 1883. 



The form differs from the species in the persistent structure 

 resulting from the leaf base ; the former lacks the lateral horns or 

 teeth. There is a wider range in megaspore size, with a slight 

 tendency toward greater size, and the confluence of the tubercles 

 is sometimes quite pronounced. 

 Phrygia: rocky hills above the village of Kaiageul, s. of Ouchak, 



30 May, 1857, Balansa 1327 (Gray Herb.). 

 Sardinia: near Pula, at foot of Mt. Santo, in wet declinities, 

 inundated in winter, alt. 30 m., granitic soil, 23 March, 1912, 

 Fiori & Beguinot 1607 (Gray Herb.) ; I. Caprera, July, 1863, 

 Ascherson & Reinhardt (Mo. Bot. Gard. Herb.) ; : I. of 

 Caprera, 11 June, 1863, Ascherson & Reinhardt (Gray 

 Herb.). 



