Resedaceae — Cistaceae. 31 



XXlll.—ALVSSC/M. 



Plants hoary with stellate hairs, filaments (or 2 of them) winged or toothed, 

 pods orbicular. 



ALYSSUM CALYCINUM. Alyssum. 6—8. Stems erect, numerous 



(98) 3 — 9 in., leaves sessile oblanceolate, flowers inconspicuous pale- 

 yellow, pods in a long raceme with persistent calyx. [C. 



ALYSSUM MARITIMUM. Sweet Alyssum. 8—9. Stem much branched 



(99) 4 — 12 in., flowers conspicuous white. [This plant, and the yellow A. 

 saxatile — a rock-plant from S. Europe, are much cultivated in gardens.] 



ORDER 7. — Resedaceae. 



Calyx inferior, of several narrow sepals. Corolla polypetalous, irregular, 

 petals laciniate. Stamens many hypogynous. Pistil syncarpous. Ovary 

 3 — 4 lobed, i-celled. Seeds many. Placentation parietal. Fruit opening at 

 the apex before the seeds are ripe. Stigmas sessile. 



RES'EDA LUTE'OLA. Dyer's Weed or Weld. 6—8. Leaves lance- 

 olate entire, sepals 4, flowers minute yellowish green. Waste places. 



RES'EDA LU'TEA. Wild Mignonette. 6—8. Leaves pinnate or pin- 

 natifid, sepals and petals 6, flowers pale yellow. Waste places. 

 Reseda odorata is the Garden Mignonette. 



ORDER 8. — Cistaceae. 



Leaves opposite entire. Calyx polysepalous inferior persistent, sepals 3, 

 convolute in aestivation usually with 2 outer smaller sepals. Corolla polype- 

 talous hypogynous. Petals 5, convolute in ^e^tivation, very fugacious. Sta- 

 mens polyandrous hypogynous. Pistil syncarpous, style I, stigmas 3. 



\.—HELIANTHEMUM. 



Stem shrubby procumbent, ovules many, style jointed at base, stigma 

 capitate or 3-lobed. 



Leaves with stipules, 160 



Leaves without stipule?, ...... H. canuni. 



160 Flowers yellow, ....... H. vulgare. 



160 Flowers white, H. polifolium. 



HELIAN'THEMUM VULGA'RE (88). Common Rock Rose. 7—9. 



(162) Leaves i in. stipulate green above hoary beneath, flowers yellow 

 large. Rocky and chalky places. 



Helian'themum ca'num (9). Hoary Rock Rose. 5 — 7. Leaves ^ in. 

 (161) exsiipulate hoary on both surfaces, flowers yellow. [G. {Malham Cove). 



Helian'themum polifo'lium (2). White Rock Rose. 7 — 8. Leaves stipulate 



(163) hoary on both surfaces, margins much recurved, flowers white. 



[T. (Brean down). 



