ROSACE/E 97 



Vicia nigricans Coss. et G. = Lens nigricans Godr. Erect, 5-12 in. 

 high. Leaves mostly ending in a mucro or upper ones in a short simple tendril. 

 Leaflets 3-4 pairs, linear-oblong. Flowers bluish-white, i or 2 on aristate 

 peduncles longer than the leaves. Calyx-teeth equal, 2-4 times as long as 

 tube, hairy. Pod rhomboidal, compressed, glabrous, fawn coloured, with 1-2 

 seeds marbled with dark brown. 



Dry and sandy places and stony slopes. April-June. 



V. nigricans is closely allied to the cultivated Lentil. V. Lens Coss. et 

 G. which is a larger plant, with simple or branched tendrils, 1-3 flowers on 

 rather shorter peduncles, 5-7 pairs of leaflets and rather larger pods. It is often 

 cultivated in the south and occasionally found as a casual. 



CICER L. 



C. arietinum L. Pois-chiche. An erect, hairy-glandular annual, i ft. 

 high. Leaves imparipinnate, with 6-8 pairs of oval acuminate serrated leaflets. 

 Flowers bluish-mauve or white, solitary on axillary peduncles which are articu- 

 lated and with a bract in the middle. Calyx-teeth equal, the lower one widely 

 separate from the rest. Pods large, much inflated, oval-rhomboidal, red when 

 ripe, with 2 seeds. 



A casual in crops and fields in Provence, etc., and often cultivated. June- 

 July. 



ROSACES. 

 Series i. Ripe carpels not enclosed within the calyx-tube. 



Tribe I. PRUNE/E. Calyx deciduous. Carpel i. Ovules 2, pendulous. 



Fruit a drupe '. PRUNUS. 



Tribe II. SPIR-fli^E. Calyx persistent, ebracteolate. Carpels 5 or more. Ovules 

 2 or more in each carpel, pendulous. Fruit a follicle SPIRAEA. 



Tribe III. RUBE^E. Calyx persistent, ebracteolate. Carpels many ; ovules 2 

 in each carpel, pendulous. Fruit of many small drupes RUBUS. 



Tribe IV. POTENTILLE.E. Calyx persistent, bracteolate. Carpels 4 or 

 more ; ovule i in each carpel, ascending. Fruit of 4 or more achenes. 



* Style elongating after flowering. 



Leaves simple. Scape i-fid. Styles of achenes feathery DRYAS. 



Leaves pinnate. Stem several-fid GEUM 



** Style not elongating after flowering. 



Leaves 3-foliolate. Achenes on a large fleshy receptacle FRAGARIA. 



Leaves 3-many-foliolate. Achenes on a small dry receptacle POTENTILLA. 



Series 2. Ripe carpels enclosed within the calyx- tube. 



Tribe V. POTERIE^E. Petals 4-5 or o. Carpels 1-3 ;. ovules i in each 

 carpel, erect or pendulous. Fruit of 1-3 achenes enclosed in the small 

 dry calyx-tube. 



Calyx 4-5 lobed, with 4-5 adnate bracts. Petals o ALCHEMILLA. 



Calyx 5-lobed. Petals 5. Stamens 12-20 AGRIMONIA. 



Calyx of 4 petaloid lobes. Petals o. Stamens 4-30 POTERIUM. 



Tribe VI. ROSE^E. Petals 4-5. Carpels many ; ovules i in each carpel, pendu- 

 lous. Fruit of many achenes enclosed in the fleshy calyx-tube ROSA. 



Tribe VII. POME/E. Petals 5. Calyx 1-5 ; ovules 2, collateral in each carpel, 



erect or ascending. Fruit fleshy, i, 2 or 5-seeded. 

 Fruit large, 5-celled, cells with cartilaginous walls. Flowers in simple 



cymes. Styles 2 PYRUS. 



Fruit small, 2-5 celled. Endocarp brittle. Flowers in compound corymbose 

 cymes. Styles 2-5 SORBUS. 



7 



