272 PENTANDRIA. MONOGYNIA. thesium. 



Anthers attached to the calyx by a tuft of filaments. 

 Nut 1-secded, covered with the persistent calyx. R. 

 Brown Prod. 1. p. 53^. Gen. pi. 410. La m. IIL 

 t. CXLII. Roem. ^ Schult. Gen. 1061. Com- 

 ANDRA Nntt. Gen. I. p. 157. Nat. Ord. i^LEACNi 

 Juss. (" olim, nunc Inceriee sedis.^^) Juss. Ann. 

 Mus. V. p. 222. Santalace^ R. Brown. 



Bastard toad-Jiax, 



T. wrnbellahmi L. : stem erect, ovaMariceolate ; fasci- 

 cles of flowers terminal, subcoiymbed. Willd. Sjoei . I. p. 

 1124. P Mr J? A F/. I. p. 177. B i g. Bust. ^. Q\. Elliott 

 5A-. I. p. 311. i?o em. & /Sc/tw /<. V. p. 581. T. corymbu- 

 lusum Mich, FL I. p. 1 1 2. Comandra umbellala N utt, 

 1. c. 



Root perennial, somewhat ligneous. Stem about a foot high, a 

 little branched, squamose towards tlie base. Leaves alternate, 

 about an inch long, numerous, smooth, acute, attenuated to a 

 short petiole at the base. Corymb many-flowered ; pedicels 

 in fours or fives, with involucrate bracts at the base. Calyx 

 with an internal glanduliferous disk ; segments ovate, acute, 

 white. Stamens seated at the base of the segments of the 

 czXyin', filaments subulate, short; anMers oval, 2-celled, at- 

 tached to the calyx on the inner side by a tuft of yellow fila- 

 ments. Style filiform ; stigma round, simple. " Germen 

 about 3-seeded ; embryos pendulous, attached to the apex of a 

 filiform contractile funiculus arising from the base of the cap- 

 sule." Kutt. JVut coated by the base of the calyx, per- 

 fecting but one seed. " Seed consisting almost entirely of a 

 large carnose and oily fierisfterm ; embryo inverted, small, flat, 

 nearly in the axis of the perisperm ; radicle superior, thick 

 and obtuse ; cotyledons linear and acute." JVu 1 1. 



Hab. On dry rocky hills and in woods; common. July— Au- 

 gust. 



JSTutta 1 1 has constituted a new genus of the North-Ame- 

 rican species of Thesium, principally on account of the anthers 

 being connected to the calyx by a tuft of filaments. This cha- 

 racter exists, more or less, in many of the species of this genus 

 as now characterized hy R. Brown. I have, therefore, for 

 the present, restored T. umbellatum to its former situation, 

 though it may yet be separated when accurately compared 

 with some of the foreign species of the genus. The glandu- 

 lar disk, I believe, is peculiar to the North-American plants. 



184. ANYCHIA. Michaux. 



Calyx 5-parted; segments oblong, connivent, callous 

 and subsaccate at the apex. Corolla 0. Filaments 



