Tas. 4873. 
HELIANTHEMUM Tvuserarta. 
Truffle Rock-rose. 
Nat. Ord. Crstacrm.—PoLyaNnpRIA MonoGyntia. 
Gen. Char. Calyx triphyllus, bibracteolatus, bracteolis minutis, rarissime ca- 
lycis foliola eequantibus vel nullis. Corolle petala 5, hypogyna, eequalia. Sta- 
mina plurima, hypogyna, omnia fertilia ; filamenta filiformia, libera; anthere bi- 
loculares, longitudinaliter dehiscentes. Ovarium uniloculare vel incomplete tri- 
loculare, placentis nerviformibus, parietalibus vel semisepta marginantibus. Ovula 
pauca vel plurima, orthotropa, e funiculis plus minus longis adscendentia vel 
pendula. Stylus terminalis, cum ovario articulatus, filiformis vel subclavatus ; 
stigma capitato-trigonum. Capsula chartacea vel subcartilaginea, unilocularis 
vel incomplete trilocularis, loculicide trivalvis, valvaruam endocarpio membranaceo, 
medio placentas vel semisepta margine seminifera gerente. Semina plurima vel 
pauca, funiculo libero ad chalazam micropyli e diametro oppositam, inserta. Hm- 
éryo intra albumen antitropus, uncinatus vel sigmoideus, cotyledonibus radicule 
supere, chalazee e diametro opposite, interposito albuming accumbentibus vel in- 
cumbentibus.—Herbe, suffrutices, vel fruticuli, in Luropa media et regione Medi- 
terranea crescentes ; foliis alternis vel oppositis, stipulatis vel exstipulatis, tri- vel 
penniveniis ; floribus solitariis, umbellatis, racemosis, corymbosis vel paniculatis. 
Endl. 
HeELianturmum Tuberaria; perenne, caulibus adscendentibus subsimplicibus, 
- foliis radicalibus in petiolum desinentibus ovato-oblongis trinerviis tomen- 
toso-hirsutis canescentibus subtus nervosis supra sulcatis, caulinis sessilibus 
subglabris lanceolatis summis alternis, pedicellis basi bracteatis paucis sub- 
paniculatis, calycibus glabris nitidis. De Cand. 
Hetrantuemum Tuberaria. Mill. Dict. n.10. De Cand. Prodr. v. 1. p. 270. 
Cistus Tuberaria. Linn. Sp. Pl. p. 741. Cav. Ic. v. 1. p. 65. t. 67. 
TUBERARIA nostras. Bauh. Hist. v. 2. p. 12. 
A really charming plant, the largest-flowered of all the species _ 
of Helianthemum, resembling in its blossoms a yellow rose, and 
well adapted for sunny rockwork in a garden. Flowers in July, 
and the blossoms continue long in succession. ‘The species in- 
habits the south of France, Italy, Spain, Portugal, Sicily, and the 
north of Africa. It derives its specific name (Zwéerarta) from 
the fact that it is found frequently in ground where Truffles 
more or less abound. Hence it is the “ Zuéeraria nostras” and 
“ Tuberaria major” of Bauhin. 
SEPTEMBER Ist, 1855. 
’ 
