50 
Pentandria. 
Sag. Apetala , Annual small-flowered Pearl-wort ; 
with downy, somewhat erect stalks, and obsolete pe- 
tals ; annual ; flowers in May and June, and is com- 
mon on walls and sandy places. 
CLASS V. 
, PENTANDRIA . 
This is a very large class ; the plants belonging to it 
have five stamens, and they are divided into six orders. 
Order I. Monogynia. One Style. 
Heliotropium. Gen. char . — Cor. salver-shaped, 
five cleft, with teeth between .j seeds four ; throat clos- 
ed with arches. 
Hel. Peruvianum, Peruvian Turnsole ; with lanceo- 
late, ovate leaves, shrubby stem, and numerous aggre- 
gated corymbose spikes ; native of Peru, as the name 
indicates, but seldom absent from the greenhouse or 
stove, on account of the delicious fragrance of its flow- 
ers. 
Echium. Gen. char. — Cor. with a naked throat, 
irregular ; stigma two-parted. 
Ech. Vulgar e , Common Viper’s Bugloss ; with a 
hairy, tuberculated stem ; stem-leaves hairy, lanceo- 
late ; spikes lateral, deflected. Biennial ; flowers ia 
