fr46 VACCIXIACEAE 



late, 4- or 5-toothed. Stamens S-10: filaments hain.-; anthers awnless. Ovar\- 

 and fruit -t-5-celled, without false partitions. Fruit in ours red, sour. 



1. V. Vitis-Idaea (L.) Britton. Low shrub, 1-5 dm. high: leaves thick, per- 

 sistent, dark green and shining above, pale and black-dotted beneath, glabrous, 

 obovate or oval, obtuse or rounded at the apex, 5-15 mm. long, with revolutc 

 margins: coroUa campanulate. about 4 mm. long. 4-lobed: stamens S: berr>' S-10 

 mm. in diameter, red. Vaccinium VitiJi-Idaeah. Rocky places and open woods: 

 Greenl. — Mass. — Alta. — Alaska; Eurasia. Je— Jl. 



5. OXYCOCCUS (Toum.) Hill. Craxberrt. 



Delicate trailing or creeping vines. Leaves alternate, persistent, entire, 

 leather^-, with more or less revolute margins. Flowers soUtarj" or few together, 

 on slender pedicels. Sepals 4. Petals 4. pink or red, distinct, narrow, and re- 

 curved. Stamens 8; anther-sacs produced into slender tubes, opening with 

 terminal pores. Ovan.- and fruit 4-ceUed. Fruit globose or ellipsoid, red, sour. 



Leaves ovate or lanceolate, -i— S mm. long; fruit globose; bracts subulate or filiform. 



Leaves stronglj- revolute, acute; fruit &-9 mm. in diameter; flowers strictly terminal. 



1. O. Oxycoccus. 

 Leaves not revolute, mostly obtusisli; fruit 10-12 mm. in diameter; flowers often 

 surE)assed by a leafy shoot. 2. O. intermedius. 



Leaves elliptic or'oblongi obtuse, 6-14 mm. long; flowers m.ostly lateral; bractlets 

 lanceolate or oblong, foliaceous; fruit rotmded-ellipsoid. 3. O. macrocarpus. 



1. O. Oxycoccus {!..) MacM. Stems slender, creeping and rooting, 1—4 dm. 

 long: leaves thick, rounded or cordate at the base, dark green above, white beneath, 

 4-6 mm. long: flowers in small umbel-like corAinbs from scaly terminal buds; 

 petals oblong, 5—7 mm. long; berrj" globose, 6-9 mm. in diameter, usually spotted. 

 Vaccinium Oxycoccus L. Oxycoccus palustris Pers. Cold bogs: Greenl. — X.J. — 

 Mich. — Wash. — Alaska. Boreal — Subarctic. My-Jl. 



2. O. intermedius uA.. Grayj Rydb. Stems coarser than in the preceding, 

 3-6 dm. long; leaves thick, broadly ovate or oval, roimded or cordate at the base, 

 green above, white beneath, shghtly revolute, S-12 mm. long; berry globose, 10- 

 12 mm. in diameter. V. Oxycoccus intermedius A. Grav. In bogs: Alaska — 

 Wash.— Ida.: e Asia. My-Je. 



3. O. macrocarpus (Ait.) Pers. Stems 3-10 dm. long; leaves oblong- 

 eUiptic, usually rounded at both ends, 8-15 nam. long, green above, pale beneath, 

 slightly revolute : inflorescence racemose from a terminal bud, nearly always pro- 

 duced into a leafy branch; beny nearly always longer than broad, 10-18 mm. 

 in length, not spotted. Bogs: >s'ewf. — X.C. — Minn. — Sask. Boreal. Je-Au. 



Family 100. PRIMULACEAE. Prdirose Family. 



Caulescent or scaix)se herbs. Leaves opposite, alternate, or whorled, 

 without stipules. Flowers perfect, in ours regular. Sepals 4—9, partially 

 united. Corolla h^-pogjTious, usually gamopetalous, or rarely wanting: 

 lobes 4-9. Stamens as many as the cah-x-lobes and alternate with them. 

 partly adnate to the corolla-tube or the calj-x; filaments sometimes united 

 at the base. Pistil single; ovar>- free or nearly so, l-ceUed, \\'ith a central 

 placenta. Fruit a l-ceJed capsule, opening by 2-S valves. 



Ovary whoUy superior and free. 

 CoroUa present. 



Corolla-lobes erect or spreading; stamens distinct, except in Lysimachia. 



Corolla salverform or funnelform, its lobes imbricate; stamens included; 

 plants scapose; leaves in rosettes, either on the basal crown or at the 

 ends of short branches of the caudex. 

 Corolla-tube equalling or exceeding the calyx; style filiform. 



Truly scapose perennials, simple, bearing a single tuft of leaves on the 



short crown; seeds numerous. 1. PRiMTrL.\. 



Low sufltruticose pereimials ; leaves rosulate or imbricat-e at the ends 

 of the branches of the caudex: seeds few. 2. DorGL.\si.\.. 



Corolla-rube shorter than the calj-x, its throat constricted; style very short. 

 Cespitose, rosulate perennials; capsule few-seeded. 3. Dbosace. 



