loo THE FLORA OF THE ALPS 



Tribe POME^. — Calyx 5-toothed ; petals 5 ; stamens 

 numerous; carpels 2-5, each with two ovules; fruit a 

 pome (pseudocarp) or drupe. Trees or shrubs, usually 

 with simple leaves and deciduous stipules. Genera 

 15-20. 



15. Pyrus, L. 



Leaves simple ; fruit (pseudocarp) a pome. Not alpine. 

 P. communis^ L., Wild Pear ; and P. Mains, L., Crab- 

 Apple ; woods and hedges. 



16. SORBUS, L. 



Flowers in compound corymbose cymes ; fruit a small 

 2-5-celled pome ; leaves simple or compound. 



S. Aucuparia, L., Rowan, Mountain Ash; leaves pin- 

 nate, fruit small, globular, scarlet; very common. 5. 

 domestica, L. ; leaves pinnate, fruit yellowish-red, pear- 

 shaped ; woods, not common. 6". Aria, Crntz. ; flowers 

 white, leaves simple or lobed, very white underneath; 

 rocky woods. vS. torminalis, L., Service-Tree ; flowers 

 white, leaves 6-io-lobed, serrate, not white beneath 

 when full-grown, fruit pear-shaped, greenish - brown ; 

 woods. S. scandica, Fr. ; flowers white, leaves inciso- 

 pinnatifid, slightly tomentose beneath ; Jura, Pyrenees. 

 kS. chamceinespilus, Crntz. ; flowers pink, in dense 

 corymbs, leaves simple, elliptical, serrate, green beneath ; 

 rocky places ; Alps, Jura, Vosges, Pyrenees. 5. Hostii, 

 Jacq. ; resembling the last, but leaves tomentose beneath ; 

 Alps, Jura, rare. 



17. Mespilus, L. 



Flowers large, solitary ; fruit with a bony endocarp. 

 M.germanica, L., Medlar; thickets, rare. 



