i4 FLOWERING PLANTS OF THE RIVIERA 



H. vulgatutn Fr. Green or glaucous, 1-2 ft. high. Leaves entire, 

 toothed or incised, the radical ones lanceolate, oval or oblong, the stem-leaves 

 3-10 in number, lanceolate, the lower ones petioled, upper ones sessile. 

 Flower heads in an upright slender panicle. Styles brown or livid. 



Woods. June-July. 



H. subalpinum Arv. T. Plant pale green. Root-leaves ovate-lanceolate, 

 entire or slightly toothed and petiolate ; stem-leaves 2-4, the lower ones 

 contracted into a narrow petiole, the upper ones sessile and half-amplexicaul. 

 Involucral bracts with whitish scarious borders, and with stellate and glandular 

 hairs. Achenes reddish-brown. 



Mountain woods and grassy slopes. June-July. 



H. boreale Fr. Root-leaves withered at time of flowering. Stem-leaves 

 oval-lanceolate, more or less toothed in lower half ; upper ones sessile and half- 

 amplexicaul. Flower heads in a leafy corymb or panicle, on short branches. 

 Involucre ovoid, dark, nearly glabrous ; bracts broad, obtuse ; styles livid. 



Woods and hill-sides. August-September. 



Among other Hawkweeds, all belonging to this sub-genus and occurring in 

 the district are: H. candicans Tausch., H. rupicolum Fr., H. bifidum 

 Kit., H. subca\sium Fr., H. prenanthoides Vill., H. rigidum Hartm., 

 H. umbellatum L., H. provinciate Jord., and H. amplexicaule L., 



besides many others, most of which are found in the higher mountains. 



AMBROSIACE.E. 

 XANTHIUML. 



A somewhat anomalous genus often placed in Compositae. Flowers mon- 

 oecious ; males in globose heads, female heads 2-flowered. 



X. strumarium L. Broad Burweed. A stout annual, 1-3 ft. high, not 

 spiny. Stems robust, branched, hairy. Leaves green, greyish beneath, ovate- 

 triangular, incised-dentate, cordate at base, long petioled. Fruit ovoid, greenish, 

 covered with hooked bristles, and ending in 2 straight beaks (Plate XIX). 



Waste, sandy places and rubbish heaps. July-September. 



X. italicum A/or., differs from the last by its elliptic fruits, which are 

 larger, with longer bristles and with 2 shortly hooked beaks. Annual of 1-2 ft. 

 in height. 



Rubbish heaps, sea-sands, and waste places. July-September. 



X. spinosum L. Spiny Burweed. A spinous annual 1-2 ft. high. Stem 

 branched from the base, having below the leaves long yellow 3-branched spines. 

 Leaves petioled, soft, white-felted beneath, green with white nerves above, 

 entire or 3-5 lobed, the terminal lobe being lanceolate. Fruit oblong, with 

 slender hooked bristles and ending in 2 straight beaks. Flowers greenish. 



Road-sides and waste places. July-September. 



X. macrocarpum DC., with very large oblong fruit, also occurs in the Var. 

 The glandular fruit is covered with strong, hooked spines. 



LOBELIACE.E. 

 LAURENTIA Neck. 



L. Michelii DC. A very small delicate annual, usually glabrous. Stem 

 delicate, erect, leafy. Leaves oblong-lanceolate, entire or crenate, mostly alter- 

 nate. Flowers small (4-5 mm.), blue, with whitish throat, solitary at tops of long 

 filiform peduncles. Calyx-teeth linear-lanceolate, about the length of or shorter 

 than the tube. Capsule ovoid. Plant 1-4 in. high. 



Damp places and borders of streams in the Var. May-July. 



