— 31 — 



And from this it becomes evident that Danthonia hreviaristata 

 with regard to development of subterranean inflorescences behaves 

 as Sieglingia decumbens — or in other words that this grass too 

 is amphicarpous ^). 



A B 



Fig. 5. S. decumbens. Diagrams of buds, A, with two flowers. B, with one 

 flower, a prophyllum, b lemma, c palea, d seed, e germ., f rudiment of a 



second floret. 



In my researches Dr. G. H. Ostenfeld and Mr. K. Dorph- 

 Petersen have assisted me in several ways, for which I here ex- 

 press my best thanks. 



^) Lately Agnes Chase has discovered ahke cleistogamous spikelets in the 

 genus Triplasis Beauv. (Bot. Gazette 45: 135 — 136, February 1908.) 



