98 LEGUMINOS&. [OxvTRons. 



12. OXY'TROPIS, DC. 



Herbs or shrubs. Leaves pinnate with a terminal leaflet ; leaflets quite 

 entire ; stipules free or adnate to the petiole. Flmvers in axillary spikes 

 or racemes, purple white or pale yellow; bracts membranous. ('nhi.r 

 tubular, teeth subequal. Petals with long claws; keel erect, with ;i 

 straight or recurved tooth at the tip. Upper filament free ; anthers 

 uniform. Ovary sessile or stalked ; style beardless, stigma minute ; ovules 

 many. Pod longitudinally more or less 2-cellcd, by the inflexion of the 

 suture next the standard. DISTRIB. Europe, temp, and cold Asia, and 

 N. America; species 100. ETYM. 6vs and *p6iris, from the sharp keel. 

 Habit, &c. of Astragalus ; distinguished only by the mucronate keel, 

 and septum of the pod never being produced from the dorsal suture. 



1. O. Uralen'sis, DC. ; silky, leaflets ovate -lanceolate, peduncles longer 

 than the leaves, flowers pale purple. 0. Halleri, Bunge. 



Dry rocky pastures in Scotland, from Wigton to Caithness ; ascending to 

 perhaps 2,000 ft. ; fl. June-July. Rootstock stout, woody ; branches very 

 short. Leaves 24 in., stipules lanceolate, membranous ; leaflets J in., many, 

 close-set. Heads 6-10-flowered ; peduncles stout, erect ; bracts leafy, 

 shorter than the calyx. Floicers\ in., pale ; keel tipped with dark purple. 

 Calyx-tule oblong, hairy and slightly glandular, cylindric ; teeth short, 

 subulate. Pod about 1 in., erect, ovoid, beak curved, sessile, tumid. 

 bursting the calyx, hairy (1- or2-celled, Brit. Fl.}, many -seeded. DISTIUH. 

 Arctic and sub-Alpine Europe, N. Asia, E. and W. N. America. 



2. O. campes tris, DC. ; softly hairy, leaflets linear-oblong or oblong- 

 lanceolate, flowering peduncles shorter than the leaves, flowers pale yellow. 

 Alpine rocks, Bradoony in the Clova Mts. ; alt. 2,000 ft. ; fl. June-July. 



Habit of 0. Urakwu, but larger ; leaves 4-6 in. ; leaflets usually longer, 

 sometimes 1 in., narrower, more obtuse ; peduncles lengthening after 

 flowering to 8 in. Flowers | in., yellow tinged with purple. Pod A-$ in., 

 sessile, ovoid -lanceolate, hairy, half 2-celled, beak curved. DISTKIB. Arctic 

 and Alpine Europe, Siberia, E. and W. N. America. 



13. ORNITHO'PUS, L. BlRD's-FOOT. 



Slender, hairy herbs. Leaves pinnate with a terminal leaflet ; leaflets 

 small ; stipules membranous. Flowers minute, in long pedunclcd heads 

 or umbels, pink white or yellow. Calyx-lobes equal, or 2 upper connate. 

 Keel obtuse, sometimes very short. Alternate filaments dilated upwards, 

 tin- upper free ; anthers uniform. Style indexed, stigma capitate ; ovules 

 many. Pod curved, slender, indehiseent, breaking up into many short 

 1 -seeded joints. DISTRIB. Europe, N.Africa, W. Asia. ETYM. opvis and 

 TTOI^S, from the fruits resembling bird's claws. 



1. O. perpuail'lus, L. ; bradts pinnate, flowers white, pod much con- 

 stricted between the seeds. 



Sandy and gravelly places from Moray and Dumbarton southwards ; east of 



. Ireland, very rare ; fl. May-July. Annual, grey-green, hairy above. Stems 



6-18 in., many, prostrate, filiform, leafy, sparingly branched. Leave* 1-2 in., 



upper sessile; leaflets -in., close-set, 6-14 pair, oblong or linear-oblong, 



the lowest pair recurved when at the base of the petiole ; stipules minute. 



