'l82 67. CHENOPUDIACEAE 



20. Flowers with bracteolcs, solitary. Perianth membranous, unchanged in 



the fruit ; segments erect. Stigmas 2. Ovule on a long funicle. 

 Pericarp membranous. Herbs or undershrubs. Leaves subulate, 

 rigid, pungent. — Species i. North-West Africa (Algeria). [Tribe 



POLYCNEMEAE.] Polycnemum L. 



Flowers without bracteoles. 21 



21. Perianth 4 — 5-lobed, membranous. Leaves narrow, clothed with thin 



hairs. [Tribe CAMPHOROSMEAE.] 22 



Perianth 5-parted, rarelv 4-parted or 5-lobed, more or less herbaceous. 

 Leaves usually broad and clothed with bladdery hairs. .... 25 



22. Perianth unequally 4-toothed, scarcely changed in the fruit. Stamens 



4. Seed erect. Embryo horseshoe-shaped. Floweis in spikes, Un- 

 dershrubs. — Species i. North Africa. Used medicinally. 



Camphorosma L. 



Perianth 5-toothed, 5-lobed, or 5-cleft. Stamens 5. Seed nearly always 



horizontal. Embryo ring-shaped. Flowers solitary or in clusters, 



in the axils of the leaves 23 



23. Fruiting perianth unchanged and unappendaged. Undershrubs. — Species 



3. North and South Africa Chenolea Thunb. 



Fruiting perianth winged, gibbous, or prickly 24 



24. Fruiting perianth gibbous or prickly. — Species 2. North Africa. [Ech- 



iv.opsilon Moq., under Chenolea Thunb. or Kochia Roth) . Bassia All. 



Fruiting perianth with one or several wings. — Species 3. South Africa to 



Hereroland and North Africa to Nubia Kochia Roth 



25. Fruit not enclosed in the perianth, dehiscing with a lid. Perianth-segments 



spreading, linear-oblong. Stamens 5, much shorter than the perianth. 

 Stigmas 2, short. Leaves elhptical or lanceolate, entire, glabrous. 

 Undershrubs. — Species :. North-West Africa (Algeria). 



Oreobliton Durieu & Moq. 

 I-'ruit wholly or partly enclosed in the perianth, indehiscent. Leaves 

 usually broad, toothed, and mealy or glandular-hairy. — Species 25. 

 Some of them yield edible seeds, dyes, and medicaments, or are used as 

 vegetables or ornamental plants ; several are poisonous. " Goosefoot." 

 (Including BUium L. and Roiibieva Moq.) [Tribe CHENOPODIEAE.] 



Chenopodium L. 



FAMILY 68. AMARANTACEAE 



Leaves without stipules. Perianth more or less dry, simple, of 1—5 im- 

 bricate segments. Stamens as many as and opposite the perianth-segments 

 or fewer. Anthers attached by the back, opening inwards by two longitudinal 

 slits. Ovary superior, i-celled. Ovules erect or suspended from a basal 

 funicle, curved. Fruit dehiscing by a lid or indehiscent. Embryo surrounding 

 the mealy albumen, — Genera 32, species 200. (Plate 41.) 



