KEY TO FAMILIES 



XIII 



(r) < <\ irj and frail feu leeded 

 iry and fruit many seeded 

 i, Ovariei -', united al the tip only 

 (n) Floweri irregular; itameni 2 4, rarely S 

 r. Shrnba 

 s. 1 1 



(r) Seeds borne directly on the ovary wall 



Seeds borne on cup- or hook like processes 

 (y) t h ary 4 celled or 4-lobed 

 m. (ii m 4i elled 



(m) Leaves rising directly from a creeping rootstock 

 (n) Leaves borne on above-ground si 



r. Leaves opposite 



s. Leaves alternate, at least above 



(r) Leaves alternate throughout; fruit of 4 nutlets 

 ] I ives opposite below; fruit a hooked pod 

 n. Ovarj 4-lobed or 4 divided 



(mi Leaves opposite; Bowers mostly irregular 



(n) iternate; tlovvers mostly regular 



z. t >v ai > .v celled 

 (x) Twiners 



(y) Erect herbs, or tendril climbers 

 (b) Ovary inferior, i.e., below the other parts 

 x. Woody plants 

 y. Herbs 



(x) Stamens 1-3 

 m. Erect herbs 



n. Climbing or trailing plants, usually with tendrils 

 (y) Stamens 4 S 

 m. Sap milky ; stamens often united 

 n. Sap not milky ; stamens separate 

 (z) Stamens many ; flowers monoecious or dioecious 

 2. Flowers in heads 



a. Ovary superior; flowers pea-like 



b. Ovary inferior; flowers not pea-like 



(1) Stamens united by their anthers 



(2) Stamens separate 

 II. Petals absent 



1. Sepals present, often petal-like, rarely very minute 



a. Calyx funnel-form, bright-colored; involucre calyx-like 



b. Calyx not funnel-form 



(1) Pistils several-many 



(2) Pistil 1, at least the ovary 



(a) Stamens as many as the sepals 

 x. Flowers in dense fleshy spikes 

 y. Mowers not in fleshy spikes 

 (x) Ovary superior 

 m. Flower clusters papery because of papery bracts 

 n. Flower clusters without papery bracts 

 (m) Sepals 3 

 (n) Sepals 4 or more 



r. Stipules papery and sheathing the joints; calyx 



corolla-like 

 s. Stipules not papery, or lacking 

 (r) Stigma 1 

 (s) Stigmas 2-4 



' 



14 



Solatia 



IS 





18 





21 



Scro fibular, 



18 



.1 ml i 



20 



in I.tliui 



V ' erbcnaceae 



21 



Bora.; 



17 



miaceat 



20 



Lamiaceae 



2t 



Boragxnaceae 



17 



Convolvulaceae 



14 



Polemoniaceae 



14 



Caprijoliaceae 



A raceae 



often 



32 



Valerianaceae 



32 



Cucurbilaceae 



29 



Campanulaceae 



32 



Rubiaceae 



31 



Begoniaceae 



30 



Fabaceae 



25 



A steraceae 



33 



Dxpsaceae 



32 



Allioniaceae 



8 



Ranunculaceae 



1 



45 



•ae 



6 



Commelinaceae 



46 



•jnaceae 



7 



Urticaceae 



10 



