PERSONATE. 



523 



Bpeaking, no characteristic feature which absolutely separates them. The 



somewhat irregular corolla, with five stamens of unequal length in Verbascum, is 



* also found in Hyoscyamus ; curved and straight embryos are found in both 



orders. The aestivation of the corolla in the Scrophulariaceae is simple imbricate, 



FIG. 582. Diagrams. A Verbascum ; B Linaria; C Veronica. 



in the Solanaceae most frequently folded imbricate (in Atropa and those allied 

 to it, imbricate without folding). The genera (about 164) are distinguished 

 according to the form of the corolla, number of stamens, inflorescence, arrange- 

 ment of the leaves, etc. Verbascum belongs to the most primitive 5-stamened 

 forms, and from it proceed a long series down to Veronica, with only two stamens 

 and most frequently the posterior sepal suppressed. 



I. ANTIRRHINEJ:, SNAPDRAGON GROUP. This has most frequently 

 a descending aestivation of 

 the petals (the posterior 

 petals are outside the lateral 

 ones, which again enclose 

 the anterior; Fig. 562 J., 

 B}. The plants belonging to 

 this group are not parasites. 



a. 5-stamened. Ver- 

 bascum (Mullein, Fig. 563 J) 

 has a slightly irregular, 

 rotate corolla ; five stamens 

 (frequently covered with 

 woolly hairs), of which the 

 two anterior ones are the 

 longer and differ often also 

 in other respects. The inflor- 

 escences are racemose, often with 

 several series of accessory di- 

 chasia in the axil of each primary 

 floral-leaf. The leaves are scat- 

 tered and, together with the 

 stems, are often covered with a 

 grey felt of branched hairs. Pi&. S63'. Verbascu 



