i88 FLOWERING PLANTS OF THE RIVIERA 



CYTINACE^;. 

 CYTINUS L. 



C. HypOClstis L. Parasitical upon the roots of Cistus. Stem thick, fleshy, 

 2-6 in. high, yellowish or reddish, covered with imbricate broad scales which 

 take the place of leaves. Flowers yellow or reddish, sessile at the summit of 

 the stem, in a terminal head mixed with bracts. Upper flowers male, lower 

 ones female. Berry soft, pulpy, many-seeded, i-celled. 



Fairly common on Cistus in places on the littoral. April-May. 



The var. 0. Kermesinus (hiss, is parasitic upon Cistus albidus and is 

 less common. 



ARISTOLOCHIAC^;. 



Calyx campanulate, regularly 3-cleft. Stamens 12 ASARUM. 



Calyx tubular, mouth oblique. Stamens 6 ARISTOLOCHIA. 



ASARUM Tourn. 



A. eurppaeum L. Leaves usually 2 only, reniform or orbicular cordate, 

 on long hairy petioles. Peduncle short, i-flowered. Flower greenish-purple or 

 brown, hairy, inch long and divided into 3 broad pointed lobes. 



Woods in the Maritime Alps, rare. April-May. 



ARISTOLOCHIA L. PITCHER-PLANT. 



A. Clematitis L. Root-stock creeping. Stems erect, 1-2$ ft. high. Leaves 

 cordate, large, with long petioles. Flowers axillary in clusters of 3-6 on peduncles 

 much shorter than the leaves. Reflexed hairs within the tube ; capsule pear or 

 fig-shaped. 



Hedges and shady places. May-July. 



A. Pistolochia L. (Plate XXIV). Root-stock short, with bundles of cylindri- 

 cal fibres. Leaves broadly cordate, emarginate, on very short petioles. Flowers 

 axillary, longer than the leaf,- with peduncles twice as long as the petiole ; tube 

 greenish-red, tongue purple-brown. 



Rocky hill-sides, etc., not uncommon. April-June. 



A. rotunda L. Root-stock globular. Leaves cordate, emarginate, nearly 

 sessile, with round lobes at the base embracing the stem. Flowers axillary, 

 solitary, on short peduncles. Perianth limb purplish-brown, with greenish stripes 

 at the back. Capsule ovoid. 



Borders of stony fields and road-sides. April-June. 



A. pall ida Willd. Root-stock subglobular. Leaves cordate-ovate, petioled, 

 obtuse or emarginate, with smooth entire margin. Flowers axillary, solitary, 

 greenish-yellow striped with purplish-brown, on very short peduncles. The 

 tube is enlarged at the summit. 



Grassy woods and stony places. May-June. 



A. longa L. Root-stock fusiform or cylindric. Leaves cordate-ovate, sub- 

 petiolate, entire ; peduncle equal to the petiole. Flowers axillary, solitary, 

 greenish-brown, with purple tongue, rather large. Capsule-ovoid or pear- 

 shaped. 



Borders of fields, very rare. April-May. Frejus, Collobrieres, near Nice, 

 and above Menton, etc. 



EUPHORBIACE^:. 



Tribe I. EUPHORBIE^E. Involucre calyciform, with many male monandrous 

 flowers surrounding one female. Perianth minute or o EUPHORBIA. 



Tribe II. BUXE^E. Flowers distinct. Stamens opposite the petals. Ovules 

 2 in each cell ... Buxus. 



