MACLOSKIE I CHENOPODIACE/E. 355 



/. Perianth-leaves 3-5, mostly unchanged in fruit. Stamens 5, or fewer, free 



or basi-connate. 3. Chenopodium, p. 356. 



/2. Perianth urn-shaped, 3~5-toothed. Leaves pinnatifid. 



4. Roubieva, p. 361. 

 /3. Perianth-leaf I. Stamen I, with a flat filament. Annual herb. 



5. Monolepis, p. 362. 



<r2. Flowers mostly unisexual ; the males bractless, with large perianth ; the 

 females without perianth, but with large bracts halfway connate about the 

 fruit. Stamens 1-5, connate below. Leaves often with glandular hairs 

 becoming scales. 6. Atriplex, p. 362. 



d.2. Flower-s in club-shaped or conical inflorescences, or minute in the hollows of seem- 

 ingly leafless stems ; hermaphrodite, proterandrous. Perianth herbaceous or 

 membranaceous, connate. Stamens 1-2. Leaves reduced, often united with 

 the segments of the succulent, jointed branches. 

 e. Leaves subtending the flowers alternate, spirally placed. 



/. Perianth above dorsally compressed, 4-angular, without wing-like borders. 

 Perianth-leaves united with each other and with the bract. Small herbs 

 with the lower leaves opposite, the upper alternate. 



7. HalopepHs, p. 366. 



/2. Perianth above extending on all sides, but without wing-like borders ; its 

 leaves free. Shrubs seemingly leafless, the segments broadening distally. 



8. Spirostachys, p. 367. 

 /3- Perianth with wing-like borders. 9. Heterostachys, p. 368. 



e 2. Leaves that subtend the flowers opposite, connate, persisting ; the flowers 

 being like joints in the cavity. Embryo conduplicate ; with scarcely any 

 endosperm. 10. Salicornia, p. 368. 



A2, Embryo planospiral (Spirolobece). Endosperm none or little. 



b. Perianth hypogynous; its leaves not connate. Stamens 5. Leaves succulent, linear- 

 subulate. II. Lerchea (Suada), p. 370- 

 b2. Perianth of female flowers none. Leaves linear-spatulate. 12. Halophytum, p. 371. 



i. NITROPHILA S. Wats. (DC. sub Banalia.] 



Small, succulent, dichotomously branching herb; with solitary, some- 

 times 3-glomerulate, flowers in the axils of the opposite leaves. Perianth- 

 leaves pergamentaceous, ovate, obtuse, i -nerved, the inner smaller. 

 Stamens 5, with 4-celled anthers. Style long, stigma enlarged, papillose 

 only on its inside. Fruit conical. Seed lenticular, shining black. 



Only species. 



N. OCCIDENTALIS S. Wats. 



The Argentine and Patagonian forms do not branch dichotomously and 

 have smaller leaves than the N. American. (Speg.) 



(W. N. Amer., Argentina); Patagon., by Golfo de San Jorge; Rio 

 Sta. Cruz. (Speg.) 



