Exacum.] GENTIANACEE 705 
corolla; 4 or 5, rarely 6-12, contorted, overlapping to the left, very 
rarely badlablicatel valvate. Stamens 4-12, as many as the corolla- 
unequal or abortive or suppressed ; filaments linear, sometimes 
dilated below; anthers oblong; dehiscence longitudinal, introrse, 
rarely extrorse. Disk of 5 glands at base of ovary, or annular, or 0 
Carpels 2, connate in a superior, 1-celled ovary, or rarely almost 
2-celled from the intruded placentas meeting ; ovules numerous ; 
style short or linear, simple; stigmas 2, small, Fruit usually a 
membranous capsule, rarely a fleshy berry. — small, many, 
sometimes winged ; albumen copious; embryo small. 
Leaves i ip corolla-lobes twisted to the right ; terrestrial or marsh 
herbs, not floating :— ig 
Ovary wets 2-celled ; style filiform Exacum. 
Ovary 1-celled :-— 
Flowers once Erythrza. 
Flowers irreg 
pe ae 2h divided ; small herbsacnae ess Hoprca. 
Canscora 
tigmas 
Style Md short or wanting; stigmas 2; petals with — forte: at 
their bas 
Leaves faba ; corolla-lobes induplicate-valvate in sees ait ian 
ing herbs 
596. Exacum Linn. 
‘Herbs, usually branched ; leaves opposite, ovate or lanceolate, 
usually 8-5-nerved. Flowers rather showy, in terminal an 
ax 
lobes keeled or winged or flat. Petals 4 or 5, connate in a rotate 
corolla, with short, globose tube ; lobes contorted, ovate or oblong, 
blue, purplish, or white. Stamens 4 or 5, adnate to corolla-throat; 
ents short; anthers large, oblong, obtuse, erect, base shortly 
2-lobed, 2-locular throughout, with 2 apical pores that at length 
usually extend to the base. Carpels connate in a more or less 
aoe 2-celled ovary ; ovules many, on large, fleshy placentas, 
ate to septum; style long; stigma small, subcapitate. Frwit 
globose, septicidally 2-valved capsule. Seeds many, minute, 
Csi testa granular. 
