GEEANIACEAE. 171 



Racemes many (10-20) -flowered : leaflets 8-12 ; blades ovate or oval. 



1. L. venosus. 

 Racemes few ( 2-6) -flowered : leaflets 4-8; blades oblong or 

 elliptic. 2. L. myrtifolius. 



1. L, venosus Muhl. Stems angled: leaflets 3-6 cm. long; blades ovate, oval, 

 elliptic, or oblong: calyx 9-10 mm. long; longer lobes lanceolate, ciliolate: 

 standard obovate, 14-18 mm. long: pods 3. 5-4. .5 cm. long. — Lower Susque- 

 hanna valley. Eather rare, in sandy soil. — Schists. 



2. L. myrtifolius Muhl. Stems angled: leaflets 2.5-4 cm. long; blades elliptic 

 to oval: calyx 7.5-8.5 mm. long; longer lobes lanceolate, eciliate: standard 

 cuneate, 13-16 mm. long: pods 4-6 cm. long. — M. Rare, in the Dillerville 

 swamp, Lancaster. — Limestones. 



Order GERANIALES. 



Herbs, shrubs, or trees. Leaves alternate or opposite : blades simple 

 or compound. Flowers perfect, monoecious, or dioecious, mostly regular. 

 Calyx of distinct sepals. Corolla of distinct or nearly distinct petals, 

 or rarely wanting. Androecium of as many stamens as there are sepals or 

 twice as many, or rarely more. Gynoecium of 2 or several united carpels. 

 Ovary superior. Fruit various. 



Plants without secreting glands or cells in their tissues. 

 Filaments partially united. 



Styles adnate around a column from which they separate at maturity. 



Fam. 1. Gekakiaceae. 

 Styles not united around a central column. 



Stamens as many as the sepals. Fam. 2. Linaceae. 



Stamens twice as many as the sepals. Fam. 3. Oxalidaceae. 



Filaments distinct. 



Calyx irregular, one sepal spurred or saccate : 



anthers united over the top of the gynoecium. Fam. 4. Balsaminaceae. 

 Calyx regular, none of the sepals spurred or sac- 

 cate : anthers distinct. Fam. 5. Limnanthaceae. 

 Plants with secreting glands or cells which are often 

 in the leaves or only in the bark. 

 Leaf-blades pellucid-punctate : fruit capsular in our 



species. Fam. 6. Rutaceae. 



Leaf-blades not punctate : fruit samaroid in our species. Fam. 7. Si.maroubaceae. 



Family 1. GERANIACEAE. Geranium Family. 



Herbs, or somewiiat woody plants. Leaves typically opposite : blades 

 toothed, lobed, or divided. Flowers perfect, regular or nearly so, cymose. 

 Calyx of 5 persistent sepals. Corolla of 5 deciduous petals. Receptacle 

 with 5 glands. Androecium of 10, or rarely of 5, stamens. Gynoecium of 

 5 carpels whose styles are adnate to an elongate colunui from which they 

 separate at maturity, each carpel 2-ovuled but with only 1 seed at maturity. 



Carpel-bodies turgid: carpel-tails (styles) glabrous within and merely recoiling at 

 maturity : anthers usually 10. 1. Geranium. 



Carpel-bodies spindle-shaped : carpel-tails (styles) pubescent within 



and spirally coiled at maturity : anthers 5. 2. Eeodium. 



1. GERANIUM [Tourn.] L. Annual, biennial, or perennial herbs. Leaf- 

 blades palmately or radially lobed, cleft, or parted. Sepals usually awn- 

 tipped. Stamens 10 or rarely 5. Carpels thick, rounded at the base. — 

 Cranesbill. Wild-geranium. 



Corolla less than 2 cm. wide : plants annual or biennial. 



Seeds smooth : sepals without subulate tips. 1. G. mollc. 



Seeds reticulate or pitted : sepals with subulate tips. 



Cymes many-flowered, glomerate : carpel-bodies pubes- 

 cent : style-beak and branches less than 3 mm. long. 2. O. caroUnianum. 



