Between Drosera filiformis and D. intermedia. 93 



numbers, each measuring 40—44 fi in length. That of 

 D. intermedia is provided with stomata which are 35-36 [i in 

 length, but about as abundant as these arc the two-celled 

 glands typical of the species. In the hybrid the stomata 

 average about 38 /^, while the two-celled glands of the latter 

 parent are reproduced in size, but reduced in number. 



A slight reference may be made now to the structure of the 

 cortex. In D. filifonnis this is made up of 4-5 rows of thin- 

 walled, richly chlorophylloid cells, with considerable inter- 

 cellular spaces between. An indurated sclerenchyma zone 

 next succeeds, composed of 5-6 layers of cells, which grad- 

 ually become larger toward the interior. The amount of 

 thickening is greatest in the second and third layers of scler- 

 enchyma. The average thickness of the thickest walls is 

 7-8 //. The chlorophylloid cortex of D. intermedia consists 

 of 1-2 layers of cells with fairly large intercellular spaces 

 between. Subjacent to this are 3—4 layers of slightly indur- 

 ated, but mostly very large, cells from the second layer 

 inwards. The average thickness of the walls is 3.5 //. The 

 outer cortex of the hybrid is made up of 2—3 layers of chloro- 

 phylloid cells, with relatively large intercellular spaces. Sub- 

 jacent are four to five sclerenchyma layers, considerably 

 less thickened than in D. filiformis, but which have, as in it, 

 the most highly thickened zone in the middle of the mass. 

 The average thickness of the thickest wall is 4. 5 /i. 



The fascicular system will not now be treated of, as equally 

 in parents and hybrid it is complicated in arrangement. 



(c) Inflorcscejice. — The scorpioid cyme of D. filiformis is, 

 from the bud state onward, semi-erect, and the flowers are 

 closely crowded along the false axis, against which they are 

 closely adpressed. The number of flowers in an inflorescence 

 averages 14. The cyme of D. intermedia is closely coiled in 

 the young state, the component blooms are somewhat loosely 

 arranged, they spread out in radiate fashion from the false 

 axis and the average number of flowers is 8. The cyme of 



