downward of the valvular calyx, the accumulated tension at a 

 certain point suddenly releasing the segments from below up- 



voluto corolla to unfold visibly, its petals expanding in about 

 thirty seconds, to a horizontal position. Quite constantly, just 



loads itself with the stringy, adhesive pollen, to be carried, prob- 



the^same quest lands on the same flower, and finding the pollen 

 gone, travels quickly over the stigmatic arms and soon flies away. 

 This process frequently repeated ensures cross-fertilization. 



Other (Enotherce include a large white-flowered variety of the 

 polymorphous (E. alMcaulis (No. 63) ; as a rarity we also meet 

 with the very neat <E. primiveris Gray (No. 65). 



Of the group belonging to the Chylisma section, we have three 

 well-marked forms represented. Of these, Nos. 73-74 are referred 

 by Mr. Watson to (Enothera hrecipex ( hay ; both have yellow flow- 

 ers, of which those of No. 73 are most conspicuous. No. 74 is dis- 

 tinguished by a more branching habit, smaller light-yellow flowers, 



A third species of this section is characterized by Mr. WaUon 

 as (Enothera Parryi n. sp. (See appendix No. 72). This lat- 



its prolonged spike of small yellow flowers being succeeded by 

 distinctly elavate capsules, curving upwards from a slender divar- 

 icate pedicel. Quite constantly associated with this latter spe- 

 cies, occupying dry gypseous clay knolls, is a very neat and showy 

 MentzeUa (No. 78). This, though closely allied to the common 

 JL ni'iUijhjra Nutt., seems to present characters sufficient to dis- 

 tinguish it as a new species. Observing the two growing often 

 side by side, the differences in habit, time of flowering and floral 

 characters seem sufficiently distinct, nor were there any interme- 



number of doubtful species. 



the charming Dalea Johnloni Watson (No. 40), with its deep 

 indigo blue spikes. Now also comes forward Coleogyne m //in- 

 fusion of light-yellow blossoms. Aster tortifolius Gray (No. 91), 



