CRASSULACE^;. 47 



GENUS I.—T ILLJ1A. Linn. 



Calyx of 3 or 4 sepals united at the base. Corolla of 3 or 4: 

 petals free from each other. Stamens 3 or 4. Hypogynous scales 

 at the base of the carpels very minute or none, or linear. Follicles 

 as many as the petals, distinct, 2- or many-seeded. 



Small annuals, growing in damp places, with opposite fre- 

 quently connate leaves and generally dichotomously branched 

 stems. Flowers axillary, sessile or stalked, very small, white or 

 rose-colour. 



This genus of plants was named in honour of Michael Angelo Tilli, M.D., F.E.S., 

 born 1G53. He was Professor of Botany at Pisa, and author of " Horti Pisani Cata- 

 logus." 1723, with fifty plates. It contains a few rare plants, observed by him in his 

 voyages to Constantinople and Tunis. 



SPECIES I.— TILL ^ A MUSCOSA. Linn. 

 Plate DXXIV. 



Stems decumbent, branched at the base. Flowers axillary, 

 sessile, solitary, trimerous, rarely tetramerous. 



In sandy places. Rare. Found near Plymouth (Mr. Archer 

 Briggs) ; in Dorset ; Hants (Dr. Bromfield) ; also in Norfolk and 

 Suffolk. 



England. Annual. Early Summer. 



Stems J to 2 inches long, slender, lying on the ground at the 

 base, ascending at the apex, generally "forming small tufts, leafy 

 and fioriferous throughout. Leaves very small, opposite, connate, 

 slightly thickened, concave, oval, rather obtuse and apiculate. 

 Flowers very minute, with 3 reddish acuminate sepals, 3 slender 

 white petals, 3 stamens and 3 pistils. Follicles contracted in the 

 middle, each with 2 minute seeds. Plant glabrous, usually reddish. 



Mossy Tillcea. 

 French, Tillee Mousse. German, Moosartige Tilliie. 



GENUS II— S E D U M. Linn. (L>. C). 



Calyx of 5 (rarely 4, 6, or 8) sepals, more or less united at the 

 base. Corolla of 5 (more rarely of 4, (3, or 8) petals, free from each 

 other. Stamens twice as many as the petals (i. e. commonly 10), 

 rarely only as many. Hypogynous scales at the base of the carpels 

 short, oval, entire or emarginate. Follicles as many as the petals, 

 distinct, many-seeded. 



