POLYGONACÉES. 399 
mento vario, sæpe lanato subfloccoso; foliis basilaribus v. in caule 
alternis paucis integris; petiolo basi dilatato amplexicauli v. minute 
ocreato ; ras floriferis a collo v. in caule axillaribus v. terminalibus, 
apice nunc involucrum 4 ferentibus, sæpius autem repetite 2, 3- 
chotomis; bracteis tot quot rami ad ramos basilaribus, nune basi 
connatis, nune squamiformibus liberis v. foliaceis; inflorescentiis 
cymosis umbelliformibus v. contraetis capituliformibus. Involucra 
solitaria v. complura, intra bracteas 2 sessilia v. stipitata, campanu- 
lata, turbinata v. cylindracea, 5-8-dentata v. lobata; eymis nunc 
abortu 4-lateralibus : bracteolis intra involucrum , setaceis v. 
tenerrimis, nunc 0. (America bor.-occid.) — Vid. p. 380. 
28. Oxytheca NuTT.! — Flores (Eriogoni)? cymosi +, involucro 
campanulato brevi subinclusi; lobis 4, alte spinuloso-aristatis Stamina 
9, vix perigyna. Germen 3-gonum; stylis 3, apice capitatis. Fructus 
Compressus ; embryone excentrico arcuato. —_Herbæ annuæ humiles ; 
foliis basilaribus rosulatis ; inflorescentiæ ramis repetito-2-chotomis ; 
bracteis ad dichotomias 3, liberis v. connatis; pedicellis articulatis 
brevissimis. (California, Chités. 
29. Chorizanthe R. Br. — Flores (fere Eriogoni) in involucro 
Solitarii; perianthii 6-meri foliolis plus minus alte connatis, æqua- 
libus v. inæqualibus, integris, dentatis v. fimbriatis. Stamina 3-9, 
perianthio plus minus alte affixa ; filamentis nunc elongatis. Germen 
L-ovulatum; stylis 3, apice capitato v. obtuso stigmatosis, sæpe 
recurvis v. revolutis. Fructus 3-gonus; embryone recto axili v. excen- 
trico arcuato; cotyledonibus latis v. angustis: radicula accumbenti- 
adscendente. — Herbæ v. suffrutices, glabri v. pubentes; foliis 
basilaribus rosulatis, altius alternis v. oppositis; cymis densis termi- 
nalibus confertis, v. involucris in dichotomiis paucis v. 1; involucro 
tubuloso, 2-6-dentato; dentibus v. aristis erectis v. sæpius divarica 
Us; flore sessili v. pedicellato, incluso v. exserto. (California, Chili*.) 
1. In Journ. Acad. Phil, ser. 2,1,169. — t. 1Y;in po Prodr., XIV, 24; Gen., I, 93, 
B. H., Gen., II, 92, n. 2. — Brise egnon REMY, n.4. — END pu + Gen 2 ME -h. Fes 
in C. G Fi. chil. 291, t. 58, fig. IL, 93, n. 4. — Mucronea . - 
FA postée re ‘ sh nn. Soc, XVII, 419, t. 20. — Acanthagonum 
: cs otius forte secti Lin 
pes É on | , Bot. A0f* Parall., pee Bot. Whippl. Exp. 132 (76 L 
10! - F3. fig. 51, 34, ri ‘4-8; Bot. Calif., I, . Spe . C-A. MEY., in Mém. 
32. — — Miens, in Trans. Linn. Soc., XXL, 144, Pro sér. 6, IV , 142. — SPACE, = à 
Buff., X, 521. _ Torn. et GR.,in Pr 
4. BEnru., in Trans. Linn. Soc., XVII,416,  Acad., “nr 192. — Tons., Bot. Williams. 
