| the) The Organism of Leguminous Tubercles. 159 
fightangles to the roots and that there is no taxiclaw governing 
_ their position on the roots. On some of the plants they are 
stowded on the root near the union with the stem. In such 
tases infection took place profusely at a very young stage of 
the seedling. On other plants very few tubercles are found 
fear the union of the root and stem, but they are widely 
- distributed over the root system. The roots illustrated in 
- plate Xt show this variation well. 
When the tubercles are young or growing rapidly they are 
ofa delicate flesh color, presenting a mealy aspect from 
—Mimerous cells of the cortical parenchyma which are being 
pushed apart from their union,by the rapidly growing meriste- 
matic tissue of ‘the tubercle. When the tubercles have 
scsi size and age the older portion presents a light 
Sa na pe meet with the flesh colored distal portion. 
in Medica co er type forms of the tubercles are represented 
In; ek ae Dolichos Sinensis, and T; rifolium. 
ae “i 38 enticulata they are remarkable both for their 
“diameter { mpact botryose ramification, attaining a 
% Frequently of 1 to x, 5™ and bearing a striking re- 
 Semblance in exte 
oa tnal appearan if 
which however zi pearance to the root galls of Alnus 
hs the tubercles are irregularly 
Nn Trifolium procumbens, Carolintanum, 
ey are cylindrical-clavate, 
AB Its seed during the months of May 
4a * 
WSthe mature a abama**, During the sunny part of dry 
S. 
= other Species ¢ 
MMer, auty Cast to a considerable distance. During 
mn, and early winter, months the seeds are 
soil, so that during mild weather in 
they germinate and grow so luxuriantly 
ME Cases valuable winter grazing. The 
"Usher ae 
_tittag zur K ater ealangen, b esonders diejenigen von Alnus und 
sch enntniss der fy) 25, mgen. 1, 151. : 
he genus, (18. Nabi Frankia subtilis Brunchorst. Ber.d.deutsch. bot. 
