Chenopodiew.] CALIFORNIA SUPPLEMENT. 387 



Herba annua, spithamsea, pilosiuscula, ramis dichotomis divaricatis. Folia inferiora petiolata, oblongo- 

 Hnearia. Bractea ad dichotomias, et sub floribus amplexicaules, stellato-trilobse, Iobis lato-ovatis apice aris- 

 tulatis. Involucra inferiora in dichotomiis solitaria et sessilia, superiora ad apices ramorum approximata. 

 Dentes involucri subulato-aristati, subpungentes, exteriore longiore. Perianthium pedicello suo aequilongum, 

 laciniis subasqualibus. 



PTEROSTEGIA. F. et M. 



Flores hermaphroditi vel polygami solitarii involucro bilobo fructifero ampliato dorsoque cristato obtecti. Peri- 

 anthum 6-(interdum 5-) partitum, herbaceum, persistens. Stamina 6 (vel 5). Styli 3, brevissimi. Stigmata 

 capitata. Ovarium trigonum, uniloculare. Ovulum unicum, basilare. Caryopsis triquetra, involucro 

 inclusa. Semen erectum. Embryo in axi albuminis farinacei ; radicula supera. — Herba annua, ramo- 

 sissima, prostrata, facie Drymariae. Folia opposita, obovata, vet subreniformia, integra vel apice 

 emarginata ; ochreae nullm. Flores axillares, subsessiles, minuti. 



P. drymarioides. F. et M. ind. sem. hart. Petrop. 1835; Am. Sc. not. N. S. 5. p. 304. 

 (Tab. XC.) 



In our specimens the involucre is only 2-lobed, not 2-leaved, and we have not observed more than three 

 stamens in a flower ; many of the female flowers want stamens entirely. 



Tab. XC. Fig. I . Portion of the flowering stem ; fig. 2. Floral bractea ; fig. 3. The same laid open ;fig. 4. 

 Flower ; fig. 5. Stamen ; fig. 6. Pistil ; fig. 7 '. Fructiferous bractea ; fig. 8. Achenium within the persistent 

 perianth : — magnified. 



Ord. L. CHENOPODIEiE. De Cand. 



1. Suseda fruticosa. Forsk Moq. Tend, in Ann. Sc. nat. N. S. 4. p. 217. Salsola 



fruticosa, Auct. 



1 . Roubieva anthelmintica ? Var. foliis hastatis. 



This differs considerably from the more usual state of the plant (Chenopod. anthelminticum L., and Ambrina 

 anthelmintica, Spach, hist. nat. des veg.5. p. 298) on account of the decidedly hastate and almost triangular 

 leaves : the flowers, too, are in a simple terminal elongated interrupted spike. The genus Roubieva of 

 Moquin Tendon, distinguished from Chenopodium by its vertical seed, and from Agathophylum by the 

 keeled segments of its perianth, which form a pentagonal covering to the nut, was constituted for one or two 

 South American species, but ought to include the present plant and a few others indicated by Spach under 

 his Ambrina, which does not differ. 



GRAYIA. Nov. Gen. 



Flores dioici, ebracteolati, spicato-subracemosi. Masc Perianthium 5-partitum, lacinis sequalibus in- 



appendiculatis. Stamina 5, receptaculo inserta, perianthii laciniis opposita. Sgvamulce hypogynae nullse. 



■ F(em. Perianthium monopbyllum, marginato-alatum, compressissimum, apice emarginatum, muticum, intug 

 supra medium utriculatum. Ovarium in fundo utriculi sessile, anguste oblongum apice attenuatum, uni- 

 loculare, uniovulatum. Stylus subulatus, basi articulatus ; stigmata duo, filiformia, exserta, hirsnta. 

 Fructus compressus, orbiculatus, perianthio aucto membranaceo venoso persistente inclusus, styli basi apicu- 

 latus. Semen verticale, compressum, orbiculatum, pericarpio tenui arete adhaerens testa, membranacea. 

 Embryo hippocrepiformis, periphericus, albumen farinaceum cingens. Radicula infera. — Fruticulus erectus, 



■ ramosus. Rami apice spinescentes, cortice albido tecti,juniores pubescentes. Folia solitaria velfasci- 

 culata, oblongo-lanceolata, basi cuneata, junior a pliberula et carnosula integerrima. 



