20 University of California Publications in Botany C VoL - 5 



I have included the section Polidiclia of G. Don, an arrange- 

 ment which seems to me natural and which I shall hope to 

 justify further on (cf. also Miers, 1846, p. 182 and East, 1912). 

 Of the twenty-four species included by Comes (1899) in these 

 two sections, ten are cultivated in the U. C. B. G. 



Nicotiana noctiflora Hook? 



The description of this species as given by W. J. Hooker 

 (1827, pi. 2785) is such that I hesitate to apply the name to 

 the plants cultivated for several years in the U. C. B. G. under 



_9_ 



No. 07. The principal differences are in the corolla lobes and 

 in the inflorescence. The corolla lobes are represented as broad 

 and emarginate by Hooker. In our plant they are broad and 

 bluntly pointed, but the blunt point is revolute and the super- 

 ficial appearance is of a blunt and emarginate lobe. The inflor- 

 escence represented in Hooker's plate is more paniculate than 

 I find in the U. C. B. G. plants. The leaves appear to be very 



much the same in both. 

 _9_ 

 U. C. B. G. 07 came from seed sent by Professor 0. Comes 



and was labelled "Nicotiana noctiflora var. albiflora." Its habit 



is low (about two feet in height), rather effuse, and sprangly. 



The leaves are coarse, especially the lower ones. They are 



elliptical-lanceolate to simply broadly lanceolate, sessile and 



slightly clasping at the base, more or less bullate above, slightly 



toothed, sinuous and undulate, with sparse, coarse prickly hairs. 



The upper leaves are narrowly linear-lanceolate, very much and 



coarsely crisped. The flowers are in long simple racemes. The 



corolla is salver-shaped, with a slender tube, about double the 



length of the calyx, and expanded gently at the summit. The 



five lobes of the limb are broad and deep, abruptly contracted 



at the tip, which is revolute, thus giving the lobes a certain 



appearance of being broad and obcordate. The corolla is reddish 



purple without and white, or slightly purplish, within. U. C. 



B. G. 07 is a near relative of N. longiflora, from which it is 

 to be distinguished particularly by its strictly annual character, 

 lower habit, its lack of a long persistent basal rosette of radical 

 leaves, and much shorter corolla. Although it seems to pass for N. 



