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LINACEAE— EUPHORBIACEAE 



Linaceae — Flax Family 

 Herbs with simple alternate entire leaves; sepals 5, petals 5, stamens 5, ovary 5-celled, styles 5, 

 fruit a 10-celIed capsule; flower syncarpou-, apopetalous, hypogynous, regular. 



1. Flowers blue 



a. Annual ; sepals pointed 



b. Perennial ; sepals blunt 



2. Flowers red 



Linum — Flax 



(Gr. linon, Lat. linum, flax) 



L. usilatissimum: com- 

 mon flax 

 L. perenne: blue flax 

 L. sanguineum: red flax 



Rutaceae — Rue Family 



Herbs, shrubs or trees with compound leaves, sometimes reduced to the terminal leaflet, and appear- 

 ing simple; sepals 4-5, or lacking, petals 4-8, stamens 4-60, ovary 2-5-celled, styles 1-?, or 2-5 separate 

 pistils ; fruit various, capsule, samara, drupe or berry ; flower apocarpous or syncarpous, apopetalous, 

 perfect, polygamous or dioecious, hypogynous, regular. 



1. Flowers greenish-yellow; leaves compound Kuta 



2. Flowers white, fragrant; leaves of one leaflet Citrus 



Ruta— Rue 



(Lat. ruta, rue) 

 Bushy herb, woody at base ; leaflets oblong to obovate, dotted 



1. Leaves 1 -foliate, evergreen 



2. Leaves 3-foliate, deciduous 



Citrus — Orange. Lemon, Citron 



(Gr. kitron, the citron tree) 



Euphorbiaceae — Spurge Family 



R. graveolens 



C. aurdntium 

 C. trijolidta 



Herbs or shrubs usually with milky juice and alternate simple leaves; sepals 3-5, somewhat united, 

 or lacking, petals 0, or rarely 5-6, stamens 1-30, ovary 3-lobed or 3-celled, stigmas 3-6, fruit a 3-celled 

 capsule; flower syncarpous, apetalous, monoecious ordioecious, hypogynous. In the genus Euphorbia, 

 a cup-like involucre, resembling a calyx, contains 1 pistillate and several-many staminate flowers of 

 1 stamen each, and frequently bears 1-4 brightly colored glands at the edge, simulating a corolla. 



1. Leaves very large, 3-6 dm. wide, 7-11 cleft Ricinus 



2. Leaves not cleft 



a. Calyx present 



(1) Staminate flowers with 8-16 stamens and no petals Acalypha 



(2) Staminate flowers with 15-30 stamens and 5-6 petals Cod'xaeum 



b. Flowers tiny, many in a calyx-like involucre Euphorbia 



Ricinus — Castor-bean, Castor-oil Plant 



(Lat. name of the castor bean) 

 Plant 1-4 m. tall; capsules spiny R. communis 



Acalypha — Acalypha 



(Gr. akalyphe, nettle) 



1. Flowers in red spikes, 1-3 dm. long A. hispida 



2. Flower clusters small and inconspicuous 



a. Greenhouse shrub with colored leaves A. tricolor 



b. Low native weed with green leaves A. virginica 



Euphorbia — Spurge 



(Gr. euphorbion, name of a resinous plant) 



1. Shrubs, often with spines 



a. Smooth shrubs with the upper leaves flower-like; involucre with 1 



yellow gland E. pulchifrima: poin- 



settia 



b. Spiny shrubs with green leaves; involucre with 2 red petal-like glands E. spicndens 



2. Smooth herbs 



