Jones: Flora of Illinois, 87. Linaceae 171 



2. Leaves 3 -divided; carpels deciduous from the styles; petals 8-10 mm. 



long; moist ground, occasional; adv. from Eur. June-Sept 



G. robertianum L. 



2. Erodium L'Her. 

 E. cicutarium (L.) L'Her. Storksbill. Waste places, occasional; nat. from 

 Eur. May-Aug. 



86. OxALlDACEAE Lindl. — Wood-sorrel Family 



1. OXALIS L. 

 {Xanihoxalis Small ; lonoxalis Small) 

 1. Flowers purple (rarely white), 14-20 mm. long; plants scapose, with a thick 

 bulb-like or scaly rhizome; woods, common. Apr.-June. Violet Wood- 

 sorrel O. yiolacea L. 



1. Flowers yellow; stems leafy; rhizomes slender. 



2. Stems creeping, rooting at the nodes, the pubescence of spreading hairs; 

 pedicels strigillose; a weed in greenhouses and gardens; native of Eur. 



[O. repens Thunb.] Creeping Wood-sorrel O. cornicu'ata L. 



2. Stems erect, or decumbent at the base. 



3. Pedicels and stems strigillose; capsules finely grayish-pubescent, abrupt- 

 ly pointed, the styles 1-2 mm. long; fruiting pe:!icels becoming de- 

 flexed but the capsules erect; common in fields, alo: g roads, or in open 



woods. May-Sept. Upright Yellow Wood-sorrel O. stricta L. 



3. Pedicels and stems with spreading hairs, or the latter nearly g'abrous; 

 capsules sparsely glandular-pilose to nearly glabrous, gradually 

 pointed, the styles 2-3 mm. long; fruiting pedicels ascending or 

 divergent. 

 4. Petals 3-10 mm. long; seeds about 1.5 mm. long, with nearly con- 

 tinuous ridges; roadsides and open woods, common. June-Nov. 

 [O. rufct Small; O. corniculata sensu Robins. &: Fern., non L.; O. 

 eiiropaea Jord. (?); O. europaea var. lanulosa Benke] Common 



Wood-sorrel O. cymosa Small 



4. Petals 12-16 mm. long; capsules 6-10 mm. long; seeds 2 mm. long, 

 the ridges discontinuous; woods, s.e. 111., near the Wabash River, 

 rare. Mt. Carmel, Schneck O. grandis Small 



87. Linaceae Dumort. — Flax Family 

 1. LiNUM L. — Flax 



(Catharlolimim Reichenb.) 

 1. Petals blue (or white), 1-1.5 cm. long; capsules 8-12 mm. in diameter. 

 2. Perennial; flowers 2-3 cm. in diameter; sepals obtusish, ciliate; occasional- 

 ly found as an escape from cult.; introd. from Eur. June-Aug 



L. perenne L. 



2. Annual; flowers 10-15 mm. in diameter; sepals acute, the inner often 

 ciliate; roadsides and waste places, occasional; introd. from Eur. June- 

 Aug L. usitatissimum L. 



