376 PROCEEDINGS OF THE AMERICAN ACADEMY 



reflexed, 2 to 4 lines long : involucre 1-2-flowered, becoming 6 lines 

 broad, cleft to below the middle, the lobes acute or acuminate : peri- 

 anth greenish, campanulate, 2 or 3 lines long : stamens 5 : fruit ob- 

 long-obovate, pubescent, very prominently 5-costate, the costaj very 

 thick and nearly contiguous. — Plains near Apache Pass, in the Chir- 

 icahua Mountains, Arizona; J. G. Lemmon, 1881. Resembling 

 forms of 0. nyctagineiis, but more slender and with more leafy and 

 less pubescent inflorescence, the more deeply and acutely lobed invo- 

 lucre with fewer flowers, and the fruit more prominently ribbed. 



BoERHAAViA PTEROCARPA. Annual, branching from the base, 

 scabrous-puberulent, a foot high or less : leaves ovate to oblong-lanceo- 

 late, obtuse or acutish, cuneate at base, entire or somewhat sinuate- 

 toothed, I to 1 inch long : peduncles axillary and terminal, short, 

 bearing an umbel of 3 to 6 white or pinkish flowers : fruit ob pyrami- 

 dal, attenuate to the very short pedicel, truncate, 3-5-sided and winged 

 at the angles, the sides transversely rugose. — At Apache Pass, Ari- 

 zona ; J. G. Lemmon, 1881. Remarkable for its winged fruit. 



Amarantus (Amblogyne) venulosds. Dioecious, nearly gla- 

 brous, erect, branching, leafy, 1 to 3 feet high : leaves linear-lanceo- 

 late, attenuate to a slender petiole, the blade 1 or 2 inches long : 

 pistillate flowers in close axillary glomerate panicles ; sepals twice 

 longer than the single small ovate acute bract, becoming thickened at 

 the rather narrow base, broadly dilated and rounded above, entire or 

 emarginate or somewhat denticulate, and marked with green veins : 

 seed I of a line broad. — Collected by Thurber at Santa Cruz, Sonora 

 (Sarratia Berlandieri, var. dentieulata, Torr. in Bot. Mex. Bound. 

 179), and in Rucker Valley and Apache Pass, Arizona, by J. G. 

 Lemmon, 1881. Staminate plants not seen. 



AcNiDA (Montelia) Floridana. Annual, tall and slender, 

 diffusely branched : leaves linear to narrowly lanceolate, attenuate to 

 a slender petiole : spikes elongated and very slender, interrupted ; 

 bracts short (scarcely |- line long), acute or shortly acuminate : utricle 

 very thin, angled and somewhat tuberculate, at length bursting irregu- 

 larly : seeds black and shining, o\)tusely margined, f of a line broad. 

 — At Key West (Blodgett), on the sandy coast at North Clear Water 

 Pass (Chapman), and in Southern Florida also by Dr. Garber and A. 

 H. Curtiss. A. tuherculata, Gray, diflfers in its stouter habit, larger 

 and broader leaves, closer and stouter spikes, and longer and more 

 attenuate acuminate bracts. 



Cladothrix oblongifolia. Stems procumbent, often 2 feet long, 

 the branches ascending, and the whole plant covered with a very 



