Systematik und Pflanzengeographie. 433 



pointed), thin or somewhat thickened at the base, not urceolata; 

 utricle thin, scarious und little wrinkled or retracted often dehiscence ; 

 leaves mostly large and long petioled: flowers in naked terminal or 

 axillary mostly pauicled spikes. {Euamaranthus.) 



A. Stamens only 3. 



A. PowellU Wats. (incl. A. WrighÜdi und A. obovatus Wats,). 



B. Stamens 5. 



A. retroflexus L. 

 A. hybridus L. 



var. paniculatus Uline et Bray. 

 A. candatus L. (incl. A. leucospermus Wats.). 



C. Stamens 3 to 5 ; bracts very long and acuminate. 



A. bracteosa n. sp. (warum nicht usf Ref.). New Mexico. 



§ 3. Sepals 5 : utricle tliin, bursting or imperfectly circumscissile : a pair 

 of stipular spines in the axils of the large leaves. 

 A. spinosus L. 



§ 4. Sepals various : flowers in very small axillary spikes or Clusters : stem 

 low or prostrate with smaller leaves than in the preceding sections: 

 stamens 3. 



A. Sepals of both kinds of flowers 4 or 5 : plant prostrate : utricle 

 circumscissile: seeds large (1.3 mmj. 



A. blitoides Wats. 



var. densifolius n. var. Arizona, Colorado, 

 var. Eeverchojii n. var. Texas. 



B. Sepals 4 or 5, spatulate, united at base : peduncles and pedicels 

 (apparently abnormaily) thickened. {Sclerojjus.) 



1. Utricle indehiscent, thick, coriaceous: style branches 2, lycate 

 in fruit. 



A. crassipes Schlecht. 



2. Utricle circumscissile, smooth : style branches 3. 



A. scleropoides n. sp. Texas. 



C Sepals thin, inconspicuousj 3 or fewer. 



1. Sepals 3. 



a. Bracts conspicuous, long, pungent, seed small (0.6 mm). 

 a. Plant erect. 



A. graecizans L. (incl. A. albus L.). 



var. pubescens n. var. New Mexico, Arizona. 

 /?. Plant prostrate. 

 A. carneus Greene. 



b. Bracts not conspicuous ; seeds larger. 



A. Blitum L., ist nach Ansicht des Verfs. nicht mehr als 

 nordamerikanisch zu betrachten. 



2. Sepals fewer than 3. {Mengea.) 



A. Californicus Wats. 



A. albomarginatus u. sp. Californien. 



§ 5. Sepals 2 to 5, uarrowly oblong or spatulate, widely separated, mosily 

 longer than the indehiscent utricle : bracte iuconspicuous. 



A. Stem erect, succulent, mostly deepred or purplex, leaves large. 



1. Utricle smooth, scarious. 



A. lividus L. 



2. Utricle rugose, coriaceous. 



A. viridis L. 



B. Stem weak, flexuous, prostrate ; leaves small. 



1. Utricle smooth, leaves deeply emarginates. 



A. emarginatus Salzm. 



2. Utricle rugose, sepals 5 ; leaves crisped. 



A. crispus Braun. 



3. Utricle fleshy, prominently 3 — 5 nerved, much exceeding the 

 2 or 3 sepals. 



A. deflexus L. 

 Beiheft VI. Bot. Ceutralbl. 1894. 28 



