GERANIACEiE. 



245 



middle one elongated and hairy; capsule short-ovoid, nearly as long 

 as the calyx. 

 Marin Co. 



7. L. Breweri Gray. Glabrous and glaucous; stems 9 to 14 in. 

 high, with a few short branches at the top; leaves narrowly linear, 

 5 to 8 lines long; flowers yellow, 3 lines long; sepals ovate, some 

 slightly glandular on the margin; petals obovate, not emarginate, 

 more than 2 times as l«>ng, 3-appendaged at base. 



Dry hill or canon sides: Alt. Diablo; Vaca Mountains. June. 



48. GERANIACE/E. Geranium Family. 



Ours herbs with perfect and generally symmetrical flowers. Sepals 

 and petals 3 or 5, the stamens as many or twit e as many. Glands of 

 the receptacle as many as the sepals and usually opposite them. 

 Lobes or cells of the superior ovary as many as the sepals, the cells 

 1 to few-ovuled, the axis of the fruit persisting. 



Leaves 3-foliolate, alternate; fruit a capsule 1. Oxalis. 



Leaves not 3-foliolate; fruit consisting of achene-like carpels which separate 

 at maturity from a central axis. 

 Stipules scarious; at least the lower leaves opposite; carpels separating 

 from an elongated central beak or axis and tailed by the persistent 



coiled or twisted styles. 



Stamens with anthers 10; leaves palmately p irted 2. Geranium. 



Stamens with anthers 5; leaves pinnatifid or pinnate, or r >undish- 



cordate . . 3. Erodium. 



Stipules none; carpels subglobose, rugose, separating from a very short 

 axis, not tailed; leaves pinnately cleft 4. Flcerkea. 



1. OXALIS L. Wood Sorrel. 

 Herbs with acid juice and radical or alternate compound exstipulate 

 leaves. Leaflets usuahy 3, obcordate, closing and drooping at night. 

 Peduncles axillary, cymosely or umbellate. v few to many-flowered. 

 Flowers regular, 5-merous. Sepa s imbricated. Stamens 10, the 

 fl aments somewhat di ated and united at base. Glands n<>ne. Cap- 

 sule oblong, membranaceous, 5-celled, more or less 5-lobcd, the cells 

 opening on the dorsal sutures through which the seeds are ejected, the 

 valves remaining attached to the axis by the partitions. Seeds 2 to 

 several in each cell. (Derived from the Greek oxus, sour, the juice 

 containing oxalic acid.) 



Caulescent; flowers yellow 1.0. cm-niculata. 



Acauiescent; flowers pink, white or rose-color 2. 0. Orcgana. 



1. O. corniculata L. Yellow Sorrel. Perennial by running 

 rootstocks, vi l<iu<-pubescent; stems herbaceous, s'ender, decumbent 

 or a-cending, 3 to 6 in. Long; leaflets mostly obcordate, 1£ in. long, on 

 slender petioles with small villous stipules; peduncles a\i lary, elon- 

 gated, bearing two or more flowers; petals yellow; capsu.e erect in 

 fruit, linear, £ in. long, many-seeded. 



Behaving in the Bay Region after the manner of an introduced 

 plant; flowering through the spring, summer and autumn. Trelease 

 in Gray's Syn. Fl. i. F. 365, credits O. Wrightii Grav to "Central 



