[Vol. 9 

 118 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



(Mo. Bot. Card. Herb.); Riz-Chauvron, August, 1893, F. 

 Hy (Mo. Bot. Gard. Herb.). 



Germany: with lacustris, Wjellingsee, Biitow, Pomerania, Doms 

 (Mo. Bot. Gard. Herb.). 



The specimen from Pomerania is a single one, which shows un- 

 doubted tenuissima characters, both in vegetative and reproduc- 

 tive features. It is a question whether it was not placed with the 

 Pomerania material originally through an error. No other sta- 

 tions than those in central France have been brought to light to 

 date, save this distant one, as indicated by a single plant. 



Hy's species /. Viollaei was based on /. tenuissima Bor. speci- 

 mens which showed brown lines about the sporangium at the 

 base of the leaf. At best, this character would serve only in 

 separating a form. Several American species show in the same 

 stand both pallid and spotted-leaved forms, as /. melanopoda 

 Gay & Dur. The species is very closely related to /. Boryana 

 Dur., rather than to I. adspersa, as Grenier and Godron indicate. 



13. I. dubia Genn. Comment. Critt. Ital. (2): 104. 1861; 

 A. Br. Monatsber. K. Akad. Wiss. Berlin, 606. 1863 ; Milde, Fil. 

 Eur. 282. 1867. 



Calamaria dubia Kuntze, Rev. Gen. PL 2 : 828. 1891-93. 



Corm 3-lobed; leaves 18-22 cm. long, yellow-green, soft, fine, 

 narrowly wing-margined at the base; ligule very broadly ovate; 

 weak peripheral strands with no accessories; sporangia com- 

 pletely covered by velum, devoid of colored cells; megaspores 

 480-560 n, similar to /. velata, but with commissures somewhat 

 smaller and sharper, causing sharper angles in joining the equa- 

 tor; warts smaller and less distinct; microspores oft two sorts, 

 some similar to /. velata, others with exospore extended into 

 wing, cristate and lobed on back. 



Distribution: Island of Magdalena, Sardinia. 



Description from Braun and Milde. 



14. I. olympica A. Br. in Milde, Fil. Eur. 285. 1867; Motel. 

 & Vendr. Actes Soc. Linn. Bord. 36 : 362. 1883. 



Calamaria olympica Kuntze, Rev. Gen. PI. 2 : 828. 1891-93. 



Corm 3-lobed; leaves 3-5 cm. long, light green, y mm. broad 

 above sheath; stomata numerous; peripheral strands less devel- 



