90 Algae. 



absence of muciferous lacunae. Recently the author chanced to notice 

 that fuUy fructified fronds of Hirome Undarioides Yendo have a 

 large sorus spreading over the midrib from margin to margin at 

 the basal portion of the lamina, instead of small patches of sori on 

 both sides of the midrib as Mr. Yendo at first observed. Besides, 

 this plant has sporiferous wings, on both sides of stem,quite resem- 

 bling the sporophyll of Undarüi pinnatifida Sur. This character 

 induced author to reduce Hirome to Undaria on account of the si- 

 milarity existing between Hirome and U. pitinatifida Sur.; for U. 

 pinnatifida Sur. not rarely has sori on both sides of the midrib at 

 the basal portion of the lamina and the sori are continuous with 

 those of the sporophylls on both sides of the stem. Again Laminaria 

 Peterseniana Kjellm. (which has been put into 1902 in a new genus 

 Undariopsis by Miyabe and me jointly in Okamura's "Nippon Sorni 

 Meli" on account of characters enumerated at the beginning of this 

 abstract (its diagnose however has not yet been publishedj) has a 

 close resemblance with Hirome Undarioides Yendo by having 

 broadly linear or linear-lanceolate area over both surfaces of the 

 median fascia and at the same time the basal fructified portion of 

 the lamina often becomes very much undulatoplicated and passes 

 to the fertile wing stretching on both sides of the stem. The author 

 considers the winged State of the ancipitous stem and the position 

 of the sorus besides many common characters enumerated above 

 as more important generic characters, while the pinnate ramifica- 

 tion, presence or absence of midrib or median fascia, greater or 

 less development of wing and confluence of sori on both sides of 

 Costa as subordinate. Thus on comparing Hivom^e with U. pinna- 

 tifida Sur. on the one hand and Hirome with Undariopsis Peterse- 

 niana Miyabe et Okam, on the other, there is an evident gradation. 

 For this reason the author considers it advisable to unite the three 

 related plants to the one genus Undaria, with some extension of 

 the generic characters as the natural consequence. 



Undaria (Sur.) extended. 



Root fibrous, at first distichously arising, stem more or less 

 compressed, ancipitous or flattened above, winged, with wings either 

 greatly expanded or remaining narrow, more or less undulate-pli- 

 cate, and soriferous or sterile; lamina linear-lanceolate, ovato- 

 rounded or pinnately lobed, with prominent midrib or thickened 

 into fascia, presenting cryptostomata and dot-like mucilaginous 

 glands; muciferous lacunae entirely wanting. Sorus limited on both 

 surfaces of wings forming undulato-plicated sporophylls, or formed 

 on both sides of the midrib or fascia either free from one another 

 or becoming confluent, or at the same time in continuation on both 

 sporophylls and lamina. Unilocular sporangia subclavate with linear- 

 clavate paraphyses which are crowned with mucilaginous mass at 

 the apex. 



Finally the author makes some remarks on distribution and 

 affinities. Okamura. 



Yendo, K., Erythrophyllum Gmelini (Grün.) Nov. Nom. (Bot. 

 Mag. Tokyo. XXIX. 346. p. 230—237. f. 1—3. 1914.) 



From a close examination of Grunow's materials of Kally- 

 menia Gmelini preserved in the Botanical Museum of Berlin and 

 of the material collected by theauthor himself in Japan, he pro- 

 poses to transfer K. Gmelini Grün, to the genus Erythrophyllum. 



