228 



THE AMERICAN NATURALIST 



[Vol. XLV 



ful. Later, Miss Vail (MacDougal, '07, p. 67) came to 

 the conclusion that the plant from Lexington, Ky., is 

 grandiflora, and a possible escape from cultivation. I 

 have not seen the herbarium material mentioned above, 

 but in the light of the fact that many dried specimens 

 could be prepared from my hybrids which as such would 

 be considered Lamarckiana, it is clearly necessary that 

 evidence from herbarium material should be weighed 

 with much caution. The average herbarium material of 

 the (Enotheras is generally not sufficient to show the pe- 

 culiarities of the earlier phases of development (rosettes 

 and basal foliage) which in the case of Lamarckiana fur- 

 nish diagnostic characters that are necessary for a full 

 identification. Unless the evidence of field collections is 

 followed up by garden cultures, there is the possibility 

 of numerous errors of interpretation. 



A specimen in the Gray Herbarium of Harvard Uni- 

 versity is stated by MacDougal ('05, p. 5) to agree per- 

 fectly with (Enothcra Lamarckiana, but in this view the 

 writer can hot accord. This plant was apparently grown 

 in the Cambridge Botanical Garden, Massachusetts and 

 bears the date 1862. The specimens are accompanied by 

 the significant notes in the hand writing of Dr. Asa Gray 

 * 1 from seed of Thompson, Ipswich, " and ' ' said by English 

 horticulturists to come from Texas." The flowers are 

 large, with petals about 4.5 cm. long and sepals about 5 cm. 

 long, very attenuate, the tips projecting 1 cm. beyond the 

 folded petals in the manner characteristic of grandiflora. 

 The stigma lobes are also grandiflora-\ike in their length, 

 about 8 mm., and in their position, about 5 mm. above the 

 tips of the anthers. A large detached leaf, about 18.5 cm. 

 long, with some evidence of former crinkles, suggests by 

 its form (although rather small) the basal leaves of La- 

 marckiana. The flowers and upper foliage of this speci- 

 men, however, agree very closely with broad-leaved types 

 in my cultures of grandiflora and do not resemble the 

 Lamarckiana that I have grown from seeds of De Vries, 

 or with his figures and descriptions in "Die Mutations- 



