1912] PACE—PARNASSIA $2$ 



6. The haploid chromosome number in Parnassia and in 

 Drosera rotundifolia is 10, in Saxifraga sponhemica about 15, and in 

 S. granulata about 30. 



7. In Parnassia and S. granulata the pollen tube empties into 

 one synergid, and apparently the same is true in Drosera. 



With reference to the systematic position, Eichinger (6) says 

 that the joining of Parnassia to the Droseraceae would completely 



be lost. 



family. Its princi 

 primary root, the 



assimilation tissue, the stipular structures, which recall the 



many 



mous 



high 



of vegetative buds are most important. In Parnassia no such 

 relation to water plants is found. If one looks for a suitable place in 



must 



with 



This family has at present so little unity 



that Parnassia makes no break in its systematic 



same Question. Hallier (1%) savs: acco 



typ 



seems to me 



departure of the monocotyledons and as the representative of a 

 separate family, the Parnassiaceae, to belong near the Ranuncu- 

 laceae, Nymphaeaceae, Droseraceae, and Sarraceniaceae. From 

 the Saxifragaceae, in which Engler (18) has placed it, it is differ- 

 entiated by the harp-shaped branching of the veins in the sepals, 

 the large, long Podophyllum and Sarracenia-like anthers, and the 

 ovule, which has a slender nucellus, as in other relatives of the 

 Saxifragaceae. 



my material, I am of the 



much more 



the Saxifrag^c^, ttll u u^t u o^^ ^ «*«** *~ *.-. — 



order with the Droseraceae. For as shown above, Drosera and 



their 



ih 



stalked 



Drosera has not. Drosera has pollen grains in tetrads and Parnassia 



