Convolvulaceen.] CALIFORNIA.— SUPPLEMENT. 363 



This appears to be allied to F. Schiedianut, Sclilect. in Linn. 6. p. 391, a Mexican plant, but the petals 

 of that species have not yet been observed. In our plant, the anthers are remarkably large, rather longer 

 than the petals, and the filaments are so very short as to be enclosed within the calyx. 



Tab. LXXXVII. Fig. 1. 2. Flowers ; fig. 2. Stamen ; fig. 3. Pistil -.—magnified. 



Ord. XXXV. ASCLEPIADEZE. B. Brown. 



1. Asclepias Mexicana. Cav. ? Ic. 1. p. 42. t. 58. 



Our plant agrees well with Cavanilles' figure, but the flowers have a faint tinge of purple, and are by no 

 means white. The structure of the inflorescence is precisely that of A. incarnata ; and Douglas found both 

 growing together on the banks of the Walla-wallah. But in this the leaves are always narrow and in fours, 

 while in A. incarnata they are opposite and much broader. 



2. A. vestita; tota arachnoideo-tomentosa, foliisoppositis oblongo-lanceolatis inferiori- 

 bus acutis superioribus longe acuminatis, umbellis in axillis superioribus breviuscule 

 pedunculatis, corolla calyce pedunculisque albo-lanatis, columna perbrevi, coronse foliolis 

 erectis late ovatis obtusissimis supra medium biauriculatis cornu subulatum incurvum 

 longe adnatum superantibus. 



Ord. XXXVI. GENTIANE^E. Juss. 



1. Gentiana detonsa. Fries. — Griseb. in Hook. Fl. Bor. Am. 2. p. 64. Id. Gentian, p. 

 256 (cum synon.). 



1. Erythraea tricantha (Griseb.) ; caule adscendenti ramosissimo fastigiato, foliis 

 oblongo-lanceolatis acutiusculis, cymis aggregatis semel-ter-dichotomis, floribus foliis 

 floralibus suffultis, alari subsessili corollae tubo sub-anthesi calycem fere duplo superante, 

 posthac subasquante, lobis linearibus acuminatissimis. Griseb. Gen. et Sp. Gent. p. 146. 



2. E. Muhlenbergii (Griseb.); caule inferne simplici, foliis ovato-oblongis obtusius- 

 culis, cymis laxis semel-ter-dichotomis, floribus lateralibus a foliis summis remotiusculis, 

 alari pedicellato, corollae tubo sub-anthesi calycem paullo excedente, lobis oblongo- 

 lanceolatis acutiusculis. 



E. Centaurium, Beck, from Oswego, is perfectly distinct from this species, and appears to be the true E. 

 Centaurium. 



Ord. XXXVII. CONVOLVULACE^. Juss. 



1 . Calystegia Soldanella. Br. — Convolvulus. L. 



2. C. subacaulis; annua humillima pubescenti-sericea, caule perbrevi, foliis longe 

 petiolatis ovato-hastatis obtusis cum mucronulo, pedunculis unifloris axillanbus petiolo 

 duplo brevioribus, sepalis late ovalibus mucronatis bracteas ovales superantibus, corolla 

 campanulato-jnfundibuliformi. 



Flowers in the dry state pale sulphur-coloured, large, and, together with the peduncle, about the height of 

 the foliage. 



