[Vol. 9 

 110 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



eral weaker accessory; ligule conspicuous, very wide and short, 

 often appearing truncate in older leaves, but pointed in young; 

 sporangium large, maximum about 12 mm. in length and 9 mm. 

 in width; velum none; megaspores white when dry, gray when 

 moist, 480-540 M in diameter, somewhat flattened, marked with 

 numerous large tubercles, closely arranged and occasionally ex- 

 tended into very short rounded ridges; microspores red-brown 

 or paler at maturity, 26-33 n, chiefly 30 n, smooth. 



Distribution: India. 

 Specimens examined: 



India: Madras, 1919, Fyson (Mo. Bot. Gard. Herb.); Peninsula 

 of India, without date, Royle (?) (Gray Herb.) ; "Peninsula 

 Ind. orientalis," Herb. Wight. Cryptogamia 4 (N. Y. Bot. 

 Gard. Herb.) ; near Seven Pagodas, Madras, February, 1922, 

 Kashyap (Mo. Bot. Gard. Herb.). 



Dr. W. S. Dudgeon, through whose courtesy material from 

 India was obtained, gives the assurance of local botanists that 

 there is but one species in India. The chief difference between 

 the descriptions of /. coromandelina and /. brachyglossa seems 

 to be one of leaf length, which would not be a character of speci- 

 fic rank. 



The specimens examined were very large in the sporangium 

 region, reminding one of the giant /. Malinverniana of Europe. 

 All mature sporangia proved to bear megaspores. No published 

 record for microspores appears available in the literature con- 

 cerning either 7. coromandelina or /. brachyglossa. The meas- 

 urements made as reported above were made from spores scat- 

 tered among the sporophylls, sometimes in small groups but in 

 all cases distinctly recognizable as Isoetes microspores. Some 

 are unusually brilliant with orange-red coloring, possibly due to 

 chemicals. 



6. I. setacea Bosc, "Diet, d' Hist. Nat." in Delile, Mem. Mus. 

 Paris 14: 100-119. pi. 6-7. 1827; (Lamarck, Encycl. Meth. 3: 314. 

 1789.) (?); A. Br. Verh. Bot. Ver. Brandenb. 4: 30. 1862; Ba- 

 ker, Fern Allies, 129. 1880, and Jour. Bot. 18: 106. 1882; Milde, 

 Fil. Eur. 28G. 1867; Motel. & Vendr. Actes Soc. Linn. Bord. 

 3G:376.pl.ll.fig.l-2. 1883. 



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



