46 



MISSOURI BOTANICAL GARDEN" 



Draparnaldia p lum osa 



) Agardh. 



m 



pool. Jan., Apr. 



common 



duced 



March 



mm 



aestivale (Hazen) Coll 



d 



Arboretum 



corns. Nym- 





phaea pool on edge of cement basin. 



Ionium 



Kiitz. Rocks in upper 



part of Garden stream, running water. This species was 



arch only. It appeared 



observed in the Garden stream in March only, 

 abruptly, grew to maturity rapidly and disappeared as sud- 

 denly as it came. Though collections were made weekly, it 

 w T as difficult to determine the exact time of its disappearance. 



_ 



was noted by the 1st of April. 

 Stiqeoclonium stagnatile (Hazen) Coll 



Fountain 



pond. 

 Oct. 



irvgyra and 



Stigeoclonium glomeratum, (H 



Coll 



Crescent 



pool. Abundant 



March and early part of April. 



cleaned and it did 



Cells of main 



3-4 



cell. 



al 



8 diameters in len 

 ►ted, some branch 

 ed a marked fascic 



variation in branch- 

 few fascicles, while 

 mcv. The thalli in 



mass 



mum 



Kiitz 



Waterfall 



face of waterfalls. 



form 



erous. 



found growing abu 



lar surface of the first waterfall in Sept., where it grew with 

 little variation in quantity through the winter and spring. 

 Water ran over the fall all winter, though under a frozen 

 surface coating of ice. It was observed in small patches in 

 the autumn on several of the other falls, which presented a 

 perpendicular or slanting surface, washed by the water. Dur- 

 ing the winter water flowed not over, but under the other 

 falls, the surface of which dried out. The second waterfall 

 presented a striking bright green patch on the horizontal 

 surface of a shelving rock which the water struck as it fell 





