332 NATURAL HISTORY OF PLANTS. 
There are some species of Cistus, such as C. symphytifolius,’ whose 
two exterior sepals are small and recurved outwardly, and whose 
style, much longer than the stamens, is slightly 
geniculate at the base; it has been proposed to 
make of them a genus under the name of //o- 
docistus® Their petals are red, as in the Cistus 
proper. In other species of the genus the 
corolla is white and the style very short. They 
had formerly been mixed in a section called Ze- 
doni (fig. 346) ; they 
have since been dis- 
tinguished into three 
other genera under the 
names of Ledonia,* La- 
danium, and Stephano- 
Helianthemum lasiocarpum. 
Cistus (Stephanocarpus) 
mons peliensis. 
carpus. The genus Cis- 
lus, thus circumscribed, 
includes some twenty 
European, African,and 
Asiatic species, most 
of them from the Me- 
diterranean region. 
The Helianthemums’ (figs. 346-345), formerly included in the 
genus Cistus, can scarcely be separated from it, except by artificial 
Instead of five placentas they have generally but three ; 
and their capsule is divided into three valves instead of five. The 
inflorescence is really in cymes, but they generally resemble racemes 
or spikes.’ The embryo is generally hook-shaped, or at least one of 
those defined in technical language as diplicatus or circumflecus. In 

Fria. 346. 
Inflorescence. 
Fia. 345. 
Diagram. 
means. 

1 Lamx., Dict., ii.n.9.—C. vaginatus AIT.— 
C. candidissimus Dun. 
2 Spacn, loc. cit., 367 (R. Berthelotianus), 
3 Don., loc. cit. (nec Spach). 
 SpaCH, loc. cit., 369 (nec Dun.). 
5 See p. 337, note 5. The gynæceum may 
here have as many as ten cells. 
6 Spacu, loc. cit., 368. 
7 Retcus., Ic. Fl. Germ., iii. t. 36-40.— 
8 Helianthemum T., Inst., 248, t. 128 (part.). 
— Pers. Syn., ii. 75.—Dun., in DC. Prodr., 
i. 266.—SPACH, in Ann. Sc. Nat., sér. 2, vi. 
360; Suit. à Büffon, vi. 15.—Enpu., Gen., n. 
5029.— PAYER, Organog., 15, t. 3; Fam. Nat., 
145,—Wittk., Ic. Hisp., ii. t. 103-158.—A,. 
Gray, Gen. Jil., t. 87.—B. H., Gen., 113, n. 2. 
Lem. & Done, Tr. Gén, 429.—Cistus L., 
Gen., n. 673 (part.). 
BERNE., in Flora (1828), 688.—WEBB, Phy. 
Canar., t. 12.—Gren. & Gopr., Fl. de Fr., i. 
161.—Bot. Mag., t. 43, 112, 264, 5241.— 
Watp., Rep., i. 206; ii. 765; Ann, i. 64; vii. 
204, 
® Because the cymes often become uniparous 
by abortion, and the axes of successive genera- 
tions are placed end to end as in a sympode, so 
as to simulate one single axis (fig. 346). 
