PLANT ORGANS AND ORGANISMS 163 



Spatuldte, like a spatula, with narrow base and broad rounded 

 apex. Example: Uva Ursi. 



Ensiform, when shaped like a sword. Example: Calamus. 

 Acerose or acicular, tipped with a needle-like point, as Juniper. 

 Falcate, sythe or sickel shaped as Eucalyptus. 

 Deltoid, when the shape of the Greek letter A, as Chenopodium. 



(b) Apex of Leaf. Acute, when the margins form an acute angle 

 at the tip of the leaf. Examples: Eriodictyon, Digitalis. 



Acuminate, when the point is longer and more tapering than the 

 acute. Examples: Pellitory, Coffee. 



Obtuse, blunt or round. Example: Long Buchu. 



Truncate, abruptly obtuse, as if cut square off. Example: Meli- 

 lotus leaflets. 



Mucronate, terminating in a short, soft point. Example: Senna 

 leaflets. 



Cuspidate, like the last, except that the point is long and rigid. 



Aristate, with the apex terminating in a bristle. 



Emarginate, notched. Example: Pilocarpus. 



Retuse, with a broad, shallow sinus at the apex. Example: Petal 

 of Rosa gallica. 



Obcordate, inversely heart-shaped. Example: Oxalis. 



(c) Base or Leaf. Cordate, heart-shaped. Examples: Lime and 

 Coltsfoot. 



Reniform, kidney-shaped. Examples: Ground Ivy, Asarum. 



Hastate, or halbert-shaped, when the lobes point outward from 

 the petiole. Example: Aristolochia Serpentaria. 



Auriculate, having ear-like appendages at the base. Example: 

 Philodendron. * 



Sagittate, arrow-shaped. Example: Bindweed. 



Cuneate, wedge shaped. Examples: Short Buchu and Uva Ursi. 



(d) Margin of Leaf. Entire, when the margin is an even line. 

 Example: Belladonna. 



' Serrate, with sharp teeth which incline forward like the teeth of a 

 hand-saw. Examples: Peppermint, Yerba Santa, Buchu. 



Dentate, or toothed, with outwardly projecting teeth. Chestnut. 



Crenate, or Scalloped, similar to the preceding forms, but with the 

 teeth much rounded. Examples: Digitalis, Salvia. 



