400 HISTOIRE DES PLANTES. 
30. Centrostegia À. GRAyY!. — Flores (fere Eriogoni) in involu- 
cro communi tubuloso v. infundibulari pauci (2, 3, v. demum 1); 
tubo involucri apice 3-6-dentato v. lobato, lateraliter supra basin 
calcaribus totidem divaricatis acutis v. aristatis cavis instructo. 
Floris receptaculum minute concavum ; perianthu foliolis 6, tenuiter 
membranaceis. Stamina 9, receptaculi margini inserta; filamentis 
gracilimis inæqualibus. Germen 3-quetrum; stylis 3, tenuibus 
capitatis. Fructus 3-gonus; embryone arcuato excentrico; radicula 
elongata accumbente. — Herbæ annuæ pusillæ, glabræ v. puberulæ; 
folus basilaribus rosulatis angustis ; ramis inflorescentiæ repetito-2- 
chotomis; bracteis sub dichotomiis 3-fidis v. 3-partilis; involueris 
ad dichotomias solitariis v. paucis. (Culifornia®.) 
Exped., — S.-Warts., Bot. 40{* Parall., . In Torr. Parke El Bot., 19, t. 8. — 
t. 34; in ra Amer. Acad. XII; Bot. Cali, B. i, Len IIL, 93, 
ll, 33 rs — PARRY, in Proc. Da avenp. Ac. ec. 2. ToRR. “ GRAY, in Proc. 
ss IV, 455 V 174. Reuy, in C. Gay F1. chil., seû VILLE, 192. — S.-Wars., Bot. hrs , 
Ÿ, —HEMSL., Bot. centr.-amer., LIL, 33. n. 1, 2 (Charisanthe). 
