302 



BOTANICAL GAZETTE 



[APRIL 



in the greenhouse of the University of Chicago, using plants from 

 the material started at the Missouri Botanical Garden in the fall. 



TABLE IV 



• _ 



f 



Variations in rate of growth and structure of culms of Scirpus validus 



UNDER DIFFERENT CONDITIONS OF MOISTURE AND HEAT 



Culm no 



E2 



E3 



B3 



B 4 



AA3 



Region 



(mm. from 



tip) 



132-172 

 172-210 

 210-247 



247-200 



80 

 100-130 

 142-172 

 240-2 70 



200-320 



200-240 

 260-200 

 310-350 

 400-450 

 500-550 



go 



105-135. 

 160-182. 



200-240* 



260-290* 



310-350 

 (400-450 



100-140 



200-240. 

 260-300. 

 330-370* 





DD3.. 



• * 



DD7.. 



* ft 



DD8.... 



400-440 

 500-540 

 600-630 



f 800-85 7 

 I872-920 



60-110 



"5-175 

 300-350. 



400-450* 



5 1 5-565 



f 44" 74- 

 1100-150* 



(.200-250 



Point at 

 which 

 change 



occurred 



(mm. 

 from tip) 



247 



205 



Q6 



304 



169 



410 



862 



119 



508 



162 



Growth 



(mm. per 



day) 



No. of 



spaces 



6.00 



8.33 

 8.75 



6.14 



22.50 

 22.00 

 30.00 

 70.00 



10.00 



18.00 

 55.oo 

 48.00 

 21.66 

 20.00 



1533 



8.33 

 27.00 



29.50 



1500 

 20.00 



17.50 



20.50 

 23.00 



23-25 



47.oo 

 29.00 

 24.00 



13.60 



7.00 

 18.00 



3900 



33 -5o 

 37.00 



16.66 



9.00 



21.50 



4 + 



ManyJ 



Many 



4+ 



4+ . 



Many 



4+ 



4+ 



4+ 



4+ 



4+ 



4+ 



Many 



Many 



Many 



4+ 



4+ 



Many 



• ft • • 



• *•••#••• 



18.66 



Many 



4+ 

 4+ 



4 + 



Layers 

 in walls 



1-2 



1 

 1 



2 

 2 



3 



Distance 

 between 



dia- 

 phragms f 



1.2 

 1.8 



2.5 



5-1 



2.8 



3.6 



3.4 

 2.9 



3-2 

 1.8 



3.0 



41 

 4.6 



1.4 



No. of 

 layers of 

 palisades 



2 

 2 



1-2 



1-2-3 



1-2-3 



1-2 



• »••« + « 



• • 



9 • 



I-2-3 



I 



1-2-3 



1.8 

 3.o 

 42 



2.4 



2.8 

 2.8 



1.8 



2.3 



2.3 

 3-5 



3.0 

 4.1 

 4.9 



6.x 



6.4 

 1-7 



17 



3.5 

 3-o 



• • • 



3-4 



17 

 2.2 



2.7 



1 



Medium 



Water 



Air 



Air 



Air 



Water 



Water 



1-2 



2 

 2 



• • • 



2 



2 

 2 



Water 



Air 



Air 



Water 



Water 



Water 



Air 

 Air 



Water 



« * * * 



Water 



Water 



Water 



Tempera 

 ture 

 °C. 



35 



30 



30 



21 



35 



35 



16 



6 



16 



16 



30 



21 



21* 



21 



# • 



. . • • • 



16 



2 2 



16 



ones 



* Not observed for a period of 4 days. * t Distance between diaphragms in mm. 



t "Many" indicates a number of fairly equal-sized spaces in contrast with 4 large spaces and several sma 



► . 



