128 ROSACES. [AGBIMONIA. 



like racemes, not honeyed ; pedicels bracteate at the base, 2-bracteolate. 

 Calyx inferior, persistent ; tube turbinate, spinous, month contracted ; 

 lobes 5, imbricate. Petals 5. Stamens 5-10 or more, inserted at the 

 mouth of the calyx. Disk lining the calyx- tube, its margin thickened. 

 Carpels 2, included in the calyx-tube ; styles exserted, stigma 2-lobed ; 

 ovule pendulous. Fruit, pendulous, of 1 or 2 achenes enclosed in the 

 hardened spinous calyx. DISTRIB. N. temp, regions, and S. America ; 

 species 8. ETYM. obscure. 



A. Eupato'ria, L. ; leaves^ interruptedly pinnate, spines of calyx 



hooked. 



Hedgebanks, copses, and borders of fields ; ascends to 1,200 ft. in Yorkshire ; 

 Ireland ; fl. June-Aug. Hairy or villous, erect, leafy, l|-3 ft., rarely 

 branched. Rootstock woody, short. Leaves 3-7 in. ; leaflets 3-10 pairs, 

 larger upwards, largest 1-3 in., sessile, oblong or lanceolate, deeply coarsely 

 serrate ; smaller J-| in., obovate or cuneate, 3-5-lcbed ; stipules foliaceous, 

 ^-lunate. Racemes lengthening and pedicels recurved in fruit; bracts 3-ficl ; 

 bracteoles close to the calyx, flowers ^ in. diam., homogamous. Calyx-tube 

 in., woody in fruit, spines many around the thickened mouth ; lobes 

 conniving, triangular, acute.- DISTETB. N, temp, regions, Himalaya, N/and 

 S. Africa, N. America. Eootstock astringent, and yields a yellow dye. " 



A. EUPATO'RIA proper ; calyx-tube obconic deeply furrowed fruiting, lower 

 spines spreading. From Sutherland southd. 



Sub-sp. A. ODOTIA'TA, Mill. ; more branched, resinous-scented, racemes denser, 

 flowers larger, calyx-tube campanulate scarcely furrowed, lower spines 

 spreading or reflexed. From the Clyde and Perth southd., local ; very rare 

 in "Ireland. 



10. POTE'RIUM, L. 



Erect perennial herbs. Leaves pinnate ; leaflets petioled ; stipules 

 adnate to the sheathing petiole. Flowers small, in dense long-peduncled 

 centrifugal heads or spikes, bracteate, 2-bracteolate, often polygamous, 

 anemophilous. Calyx tube turbinate, mouth contracted ; lobes 4, petioled, 

 deciduous, imbricate in bud. Petals 0. Stamens 4 or more, inserted at 

 the mouth of the calyx, filaments slender ; anthers pendulous. Disk lining 

 the calyx-tube and closing its mouth. Carpels 1-3, enclosed in the calyx- 

 tube ; styles filiform, stigmas penicillate ; ovule 1, pendulous. Achenes 

 solitary, enclosed in the hardened 4-angled often winged or muricate 

 calyx-tube. DISTRIB. N. temp, regions ; species 20. ETYM. obscure. 



1. P. Sanguisor'ba, L. ; upper flowers female, lower male or 2-sexual, 

 stamens 20-30 much exserted, fruiting calyx 4- winged reticulate but not 

 pitted between the wings, edges of reticulation smooth. Salad Burnet. 



Dry pastures; ascending to 1,600 ft. in Yorkshire; E. Scotland only from 

 Perth to Berwick, local; rare in Ireland; Channel Islands ; fl. June-Aug. 

 Glabrous or nearly so. Rootstock stout. Stem 6-18 in., ascending, 

 slender, much branched. Radical leaves 4-10 in. ; leaflets 5-10 pair, j f in., 

 broadly oblong, coarsely serrate ; stipules leafy. Flower-heads - in., on 

 long peduncles, shortly oblong, purplish. Calyx-lobes & in., oblong; wings 



