334 GYSTANDRIA. [d* XX. 



litary ; scales of the calyx with branched thorns ; stem winged, 

 with the decurrent, lance-shaped, thornless leaves. Stem two- 

 feet high, branched, spreading, uninterruptedly winged : root- 

 leaves lyre-shaped : flowers bright-yellow. Annual : flowers in 

 July and August : grows in corn-fields and hedges, in the south 

 of England : rare, and probably not indigenous. Eng. Bot. vol. iv. 

 pi. 243. Eng. Fl. vol. iii. p. 469. 1229. 



CLASS XX. GYNANDRIA. 

 Stamens situated on the Style or Germen. 



Order I. MONANDRIA. One Stamen. 



* Anther of two distinct vertical cells, permanent, fixed to the 

 summit of the style. 



1. O'RCHIS. Nectary with a spur behind. 



2. A'CERAS. Calyx converging. Nectary without a spur, flat- 



4. O'PHRYS. Calyx spreading. Nectary without a spur, convex, 



3. HERMI'NIUM. Calyx spreading. Petals with lateral lobes.. 



Nectary without a spur, flat. 



** Anther parallel to the stigma, of two cells, close together, 



6. NEO'TTIA. Calyx converging, embracing the base of the flat 



spurless nectary. Petals converging. Column without wings, 



5. GOODYE'RA. Calyx spreading, embracing the base of the- 



globular inflated spurless nectary. Petals converging. Co- 

 lumn without wings. 



7. LISTE'RA. Calyx spreading. Nectary without a spur, nearly 



flat. Petals spreading. Column without wings. 



*** Anther terminal, fixed, permanent. 



8. EPIPA'CTIS. Nectary spurless, tumid below at the base, 



contracted in the middle, undivided at the end. 



**** Anther terminal, moveable, deciduous. 



9. MALA'XIS. Nectary embracing the column with its concave 



base, spurless, sessile. Petals spreading. 



10. CORALLORHI'ZA. Nectary unconnected with the column,, 



spurred or stalked at the base. Petals spreading. 



Order II. DIANDRIA. Two Stamens. 



11. CYPRIPE'DIUM. Calyx and petals spreading. Nectary in- 



flated. Column with a terminal, dilated appendage. 



ORDER III. HEXANURIA. Six Stamens. 



12. ARISTOLO'CHIA. Calyx of one leaf. Corolla none. Stigma 



six-lobed. Capsule six-celled. 



