110 TBTRANDRIA. TETRAGTNIA. 



Small herbs^ flowers nearly solitary, terminal and axil* 

 lary, upon long peduncles, petals oUen caducous. 

 Species. U S.procumbens. — An European genus. 



165. TILL^A. L. 



Calix 3 or 4-parted. Petals 3 or 4, equal. 

 Cajjsules 3 or 4, two or many- seeded. Stamina 

 sometimes 8, 4 sterile. 



Small succulent herbaceous plants, allied to Crassula 

 and Sedum; leaves opposite, r;^rely ternate; flowers mi- 

 nute, axillary, cymose, or umbellate. 



Spceies 1 TP*q/?nosa (5ef/wn/>7m7///;w, Mich.) Erect; 

 stem vertjcdlately or tricho (.monsly branched from the 

 base; leaves alternate, almost cylindric, oblong; flowers 

 subdicliotomously cymose, alicrnate and pedicellaie, oc- 

 tandrous; capsules connate, 2 to 4 seeded, opening ex- 

 ternally. 



Annual. Two to 4 inches high, *« flowers white, octan- 

 drous," Mich. Capsules 4, uniied, never separable, with 

 subulate and at length long mucronate po nts, openmg on 

 the under side. Seeds germinating as ^oon as they fall, 

 the young plai;ts remaining gieen ihroughout the winter, 

 in these tlie leaves are f)val-oblong and succulent. Branch- 

 es abuut 4 from the same point. — Collected in winter on 

 the " Klat-H'»ck," above Canid n in North Carolina, glow- 

 ing with mosses in the wet and gravelly excavations of 

 the rock, in the same place v here it was discovered by 

 Michaux, and hitherto fc)und in no other spot, as Mr. 

 Pursh evidently confounds this plant with the S pulcheU 

 turn, when he speaks of its growing on the east banks of the 

 Shenandoah river m Virginia, the latter bemg there suf- 

 ficiently abundant, and yet he quotes the remote habuat 

 of Michaux, '* on rocks around Knoxville,*' (Tennessee) 

 and indicates by his mark (~) that he has never seen iS". 

 pulcheUnm^ notwithstanding its prevalence around Har- 

 per's Ferry, &c. &c. in Virginia. 



Having never seen this plant in flower, I am unable to 

 ascertain its genus; it is, however, at the same time much 

 more nearly related to Tillcea, than to Sedum. In the struc- 

 ture of the capsule it ent rely diflers .rom every other 

 plant in the Natural Order Semperviva 



Of TiUcea there are in America besides the above, 1 

 species in Peru, 4 also in Europe, and 4 at the Cape of 

 Good Hope. 



