Home button Advanced search Herberia Partners Herbaria team members Herberia links Contact

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z



A B C D E F G H I J K L M N O P Q R S T U V W X Y Z






What is an Herbarium?

Genus Descriptions

Species Descriptions

Ontario FEC V-Types

Bibliography

Terminology

Who Collects the Plants?

Collector Biographies

Nomenclature Primer

Website Information

Northern Ontario Plant Database
 
Leaf Apices




Attenuate a sharp-pointed apex with concave margins that form an angle less than (<) 45 degrees.
Acuminate a sharp-pointed apex with straight or convex margins that form an angle less than (<) 45 degrees.
Acute an pointed apex with margins that form an angle between 45 and 90 degrees.
Obtuse a blunt apex with margins that form an angle greater than (>) 90 degrees.
Rounded an curved apex with margins that form a smooth arc.



Caudate an attenuate apex with a slender tail-like appendage at the tip.
Cuspidate an acute apex with a stiff tip or cusp.
Mucronate with a small extension of the midrib barely extending beyond the blade apex.
Emarginate with a shallow depression at the apex, not exceeding ? of the distance to the centre of the leaf blade.



Truncate a broad, flat apex, abruptly ending at right angles to the midvein.
Retuse a rounded summit with a shallow depression at the apex, not exceeding 1/16 of the distance to the centre of the leaf blade.
Obcordate apex with prominent, rounded lobes, cut ? to ¼ of the distance to the centre of the leaf blade.
Cleft apex divided into rounded or straight-margined lobes, cut ¼ to ½ of the distance to the centre of the leaf blade.

 
Last Modified: