650 



PART III. THE CFiASSlFICATION OF PLANTS. 



Sub-order 1. Ehretoideje. Style at the apex of the ovary. 



Heliotropium peruvianum, is a well-known garden plant with fragrant flowers. 



Sub-order 2. Boraginoide^. Style inserted between the four lobes of the 

 ovary (gynobasic). 



Myosotis is the Scorpion-grass ; M. palustris, the Forget-me-not, occurs in 

 damp places, M. sylvatica in woods, and M. arvends and others in fields. 

 Lithoitpcrmum arveme (Gromwell), L. officinale, Echium vulgare (Viper's Bu- 

 gloss), with an irregular flower, Symphytum officinale, the Comfrey, Lycopsis 

 arvensis (Common Bugloss), Cynoglossnm officinale (Hound's-tongue), and Borage 

 officinalis, the Borage, are common. Anchnsa officinalis, the Alkanet ; Mertensia 

 maritima, the smooth Gromwell or Sea-Bugloss ; and Pnlmonaria angustifolia, 

 the Lung-wort, are rare in Britain. 



^f>.Tn 



A t 



Fig. 460.—^ Flowerof Anchusa ^slightlymao^.): 

 fc calyx ; c corolla ; h the scaly appendages. B 

 Fruit of Myosotis (mag.); t the receptacle ; mm 

 the four achaenia ; g the gynobasic style. C Dia- 

 gram of the quadrilocular ovary in trans, section : 

 r the dorsal sutures; 2'ptheplacentfe; s the ovules. 



Fig. 451. — Corolla of Enj- 

 th%-cea Centnurinm spread out : 

 r tube ; 8 limb ; a stamens. 



Cohort IV. Gentianales. Flowers regular, zygoraorphic in 

 consequence of oligomery in the gynaeceum (see Fig. 324) : perianth 

 and androecium usually 4- or 5-merous : corolla with frequently 

 contorted aestivation (to the right) : stamens inserted on the tube 

 of the corolla : carpels two : leaves commonly decussate and exsti- 

 pulate : formula K (5) (C (5) A 5) 6?'1». 



Order 1. Gentianace^. Carpels perfectly connate, forming a 

 uni- or incompletely bi-locular ovary : ovules parietal, numerous, 

 anatropous : seed with endosperm. Usually herbs without milky 

 latex : leaves almost always entire. 



Sub-order 1. Gentiane.*:. Leaves decussate : corolla with contorted Aesti- 

 vation. 



Gentiana (Fig. 324 E), the Gentian, has a bilobed stigma; it occurs in 

 mountainous districts. Erythraea has a capitate stigma ; E. Centaurium, the 



