NATURAL SCIENCES OP PHILADELPHIA. 75 



"On low mountains." 480. A. ovalifolia, Decaisne, Gray, Man., 1862, var. 

 481. A. verticillata, L., a common dwarf variety of the region, only three or 

 four inches high. 



NYCTAGINACEiE. 

 482. Oxybaphps angustifolips, Sweet ; the same as Fendler's 745. 483. 

 0. nyctagineus, Sweet, with the upper leaves nearly sessile ; both glabrous 

 and hirsute forms. 572. Abronia fragrans, Nutt. 573. A. cycloptera, Gray. 



CHENOPODIACEiE. 

 484. Obione argentea, Moq. The same as 574 of Wright, and 708 of Fend- 

 ler. 485. Chenopodipm hybridpm, L. " Low mountains ; rare." 486. Mon- 

 olepis Nuttalliana, Moq. (487. See Amarantacese. ) 488. Chenopodina 

 depressa, perhaps also C. prostrata, Moq. " South Park, and on the plains." 

 The root is annual. 489. C. maritima, var. erecta, Moq. 308. Obione canes- 

 cens, Moq. 



AMARANTACEJE. 

 487. Frozlichia (Oplotheca, Nutt.) Floridana, Moq. "Sand hills, on the 

 plains."* 



POLYGONACE^E. 



490. Polygonum Bistorta, L., var. oblongifolium, Meisn. 491. P. vivi- 

 parpm, L. 492. P. tenpe, Michx., in several varieties, one of them (Parry's 

 No. 322a of 1862) from the alpine region, only two or three inches high, with 

 oblong or oblong-lanceolate leaves, appears to be to P. tenue what P. avicidare, 

 var. nanum, Boiss., is to the ordinary P. avicidare.\ 493. P. coarctatum, 

 Dougl., var. minus, Meisn.; a depauperate form? "Blue River, on the 

 western slope of the Rocky Mountains." 494. Oxyria digyna, R. Br. 495. 

 Rumex venosus, Pursh. 496, 498. R. salicifolips, Weinm. 497. R. 

 maritimus, L. " Subalpine, and on the plains of Nebraska." 499. R. 

 longifolius, DC. (i?. Hippolapathum and R. domesticus, Fries. Extends into 

 the mountains; very common. 500. Eriogonum alatpm, Torr. 501. E. 

 annudm, Nutt. 502. E. effpspm, Nutt., with rose-colored flowers. 503. E. 

 cernupm, Nutt. 504. E. umbellatpm, Torr. , both with straw-colored (Parry's 

 318,) and. with deep yellow flowers (Parry's 315). 505. E. flavum, Nutt., a 

 low form from the alpine region, and a large variety (var. crassifolium, Benth. ) 

 from a less elevated region. 



ELvEAGNACE^E. 



506. Shepherdia Canadensis, Nutt. "Subalpine pine woods." 



SANTALACE.E. 



507. Comandra pallida, var. angustifolia, A. DC. C. angustifolia, Nutt., 

 ined. 



LORANTHACE^E. 



574. Arceuthobium campylopodum, Engelm. Probably only A. Amerieanwn, 

 Nutt. 



EUPHORBIACE^. 



508. Euphorbia marginata, Pursh. 509, (also 438 of Parry) E. Montana, 

 Engelm. 510. E. dictyosperma, Fisch. and Mey, 511. E. hexagona, Nutt. 



* On the plains, in similar situations, Mr. Hall collected Amblcgyne (Sarratia) Torrci/i, Gray, in 

 Proceed. Amer. Acad., 5, p. 169, the narrow form, noted in H. Engelmann's collection. Parry'6 No. 

 323, referred doubtfully to Montelia, is probably the male of this. 



t Dr. Engelmann, in a letter, referring all the forms of No. 492 to P. tenue, arranges them as 

 follows: " Var. a. commune: majus; nucibus majoribus (sesquilineam longis). p. microspermum : 

 minus, gracilius; nucibus vix lineam longis. y. latifolidm; humile ; foliis oblongis ; spicis coarr- 

 tatis ; bracteis superioribus (aristo destitutis) muticis. Meisner, in the Prodromus. is wrong in 

 saying that the nuts are subopaque or rough on the edge; they are perfectly smooth and shining 

 with concave sideB and an acumination." 



1863.] 



