Explanation of the Plates. 155 



Fio. 



48. Front view of flower of Nigritdla angnstifolia Rich., x 6. 



49. Longitudinal section of flower of Anchusa a/rvensis L., x 3. 



50. Front view of the ooroUa of Pedicularis recutita L., x 6. 



51. Lon^tudinal section of flower of CEnothera grandiflora Lam. ; 



natural size. 



52. Lateral view of flower of Calceolaria Pam>nii Benth., x 2. 



53. Longitudinal section of flower of PhygeUus capensis., x 1^. 



54. Longitudinal section of flower of Gynmadenia odoratissvma L. 



55. Transverse section of the upper part of flower of Aphyllanthes 



monspdiensis L., x 10. 



56. Lateral view of a corolla of Galwpsis grandiflora, x 2. 



57. Longitudinal section of flower of Na^cissiis jitncifoliiis Keg., 



xli 



58. Longitudinal section of a corolla of Scutellaria albida L., x 5. 



59. Front view of a corolla of Scutellaria albida L., x 5. The 



lower lip cut away. 



60. Longitudinal section of flower of Oynoglossum pictum Ait., 



x4. 



61. Transverse section of the lowest part of flower of Gentiana 



Jwma (Neilr. var.) The section is made close above the 

 nectar-cavity, across the axis of the ovary. 



62. Transverse section of the lower part of flower of Geranium 



Bohertianum L., x 6. 



63. Flower of Matthiola varia (Sibth. et Sm.), seen obliquely 



from above, x 2. 



64. Lateral view of flower of G^ntiama ciliata L., natural size. . 



65. One of the two inner petals of Hypecoum procwmbens L., 



seen from the side turned towards the ovary, x 2|. 



66. Lateral view of flower of Sypecoum procwnicns L., x 3. 



67. Longitudinal section of flower of Swertia perenrds L., x 3. 



68. Lower part of a petal of Swertia pertnnis L., with the two 



nectariferous epiblastemes, x 8. 



69. Longitudinal section of one of the nectariferous epiblastemes 



from the petals of Swertia pereimis, x 10. 



70. Longitudinal section of a short-styled flower of Menyanthes 



trifoliaia L., x 2. 



