NOTES ON TRILLIUM 335 



refers this plant to T. pionUuni Pursh. I made a careful sketch and 

 description of the Linnean specimens, and asked M. Poisson, of 

 the Paris Herbarium, to compare them with Michaux's material. 

 He replied: " Le Trilliuiii pmillum est represente par un seul 

 echantillon dans I'herbier Michaux. Quant a I'identification, c'est 

 absolument la meme chose que votre croquis. Vous etes done 

 absolument dans la verite en identifiant les deux plantes." 



There are two specimens on the sheet in Linuasus's herbarium. 

 The larger has a slender stalk 14*5 cm. long, and barely exceeding 

 1 mm. in greatest width. The three leaves are oval to lanceolate, 

 subsessile, 4-2 cm. long by 1 •2-1-4 cm. broad. The flower has a 

 short erect pedicel 6 mm. long, oblong lanceolate sepals 2 cm. long 

 by 5-6 mm. broad, and very delicate lanceolate slightly shorter 

 petals ; the stamens and pistil are completely hidden. The smaller 

 has a stalk just over 10 cm. long by 1 mm. thick, lanceolate leaves 

 about 3 cm. long by 8-5 mm. broad, and an almost sessile flower 

 with sepals 1*3 cm. by barely 3 mm., and petals 1-4 cm. long ; part 

 of the anthers are visible, and correspond with those in Clayton's 

 specimens. 



Clayton's plants, of which there are three, have a slender stalk 

 15-20 cm. long by 1 mm. or less in thickness. As stated by 

 Gronovius {I.e. 157), one plant, which],! have figured, has a rhizome; 

 the portion remaining is horizontal, 12 mm. long by 4 mm. thick, 

 bearing thin membranous sheaths, while the stalk is also sheathed 

 at the base for about 12 mm. The leaves are sessile, lanceolate, 

 blunt, and 3-nerved, 2-6-3 cm. long by 9-11 mm. broad. The 

 flowers are sessile and erect, the sepals bluntly lanceolate, 1-5 cm. 

 long by nearly 5 mm. broad, the petals barely 1-5 cm. by 4 mm., 

 lanceolate and subacute ; the stamens 7-8 mm. long, with the 

 filament barely as long as the twisted anther, above which the 

 connective is not prolonged ; the ovary bears six longitudinal 

 ridges, and is 2-5 mm. long ; there is a style 2 mm. long, bearing 

 three slender suberect stigmas (a little over 3 mm. long), which 

 reach about the same level as the tops of the anthers. 



It is, as Watson suggested, near T. Catesbm. Ell. (T. stylosum 

 Nutt.), from which it is distinguished by its smaller erect sessile or 

 very shortly stalked flowers. The same author points out that 

 the 2\ texanum Buckl., from N.E. Texas, known only from the 

 description (inProc. Acad. Nat. Sci. Philad. 1860, 443) is apparently 

 synonymous ; the flower-stalk is, however, longer (6 lines), while 

 the flowers are smaller (sepals 6 lines long by 2 lines wide). 



Explanation of Plate 426. 



A. Trillium lyusillum Mich., plant in herb. Gronovius, nat. size. — 1. Sta- 

 men, X 2. 2. Pistil, X 2. 



B. T. Ruijeli Rendle, nat. size. — 3. Stamen, x 2. 



