CBA88ULACEJE. 



309 



Fig. 342. 

 Flower. 



Fig. 343. 

 Long, section of flower. 



formed as in the other species of Sempervivum. Monanthcs includes two 



Or three Species from the Cotyledon (EcUoeria) racemomm. 



Canaries, 1 humble peren- 

 nial csespitose herbs, 

 with slender climbing 

 dichotomous steins. The 

 fleshy leaves are opposite 

 or alternate, distant on 

 the elongated branches, 

 or approximated and ros- 

 ulate. The small flowers 

 form cymes, pluriparous, or uniparous and racemiform. 



Cotyledon? (figs. 341-343) has regular pentamerous flowers. In 

 Umbilicus, 3 the commonest species in this country, the calyx consists 

 of five sepals, slightly united at the base. The corolla is somewhat 

 longer and gamopetalous ; the tube is pentagonal, with obtuse 

 angles corresponding with the median line of the lobes. These are 

 heart-shaped and acuminate, twisted or imbricate in the bud. The 

 androceum consists of ten stamens, the five oppositipetalous a little 

 the longer, all inserted on the corolla and adherent to it for a long way. 

 The apex of the filament, alone free, bears an anther with two 

 lateral cells, of marginal dehiscence. The gynseceum is formed as 

 in Sedum and Crassula, with very numerous ovules 4 arranged in 

 several rows. The oppositipetalous glands, corresponding with the 

 back of the carpels, are quadrilateral and flattened. 



PistorinicC differs at first sight from Cotyledon in the length and 

 slenderness of the tube forming the base of the corolla ; but cannot 

 be made a distinct genus owing to the transitional forms found in 

 Umbilicus, where the corolla is often campanulate. The same ajDplies 

 to Echeveria? wherein the tube is often broad and short, with some- 

 times almost complete polypetaly, but it is connected by certain trans- 



1 DC, PI. Grass., t. 157 ; Prodr., iii. 414 

 (Sempervivum, sect, iii.) — Curt., in Pot. Mag. 

 t. 93. 



2 L., Gen., n. 578. — J., Gen., 307. — DC. 

 Prodr., iii. 396.— Endl., Gen., n. 4618.— B. H. 

 Gen., 659, n. 8 (incl. : Echeveria DC, Pachy 



phytum Kl., Pistorinia DC, Umbilicus DC). 



3 L., Spec., 615. — C.umbilicata Lame., Died, 

 ii. 140. — C. rupeslris Salisb. — Umbilicus pendu 



limns DC, PI. Gr., t. 156 ; Prodr., iii. 400, n. 

 6. — U. Veneris Blackw., Herb., t. 263. 



4 With two coats. 



5 DC, Prodr., iii. 399. — Endl., Gen., n. 

 4619. A herbaceous erect annual, from Spain 

 and Algeria. (DC, Mem., ii. 25, t. 1 j PI. Gr. 

 t. 122.— Boiss., Voy. Ksp., t. 63.) 



6 DC, Prodr., iii. 401. — Endl, Gen., n. 

 4621.— Pachy phy turn Kl., in Otto, et Diet. 



