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ANALYSIS OF THE SPECIES OF PLAN PAGO, ACCORDING TO SEED CHARACTERS. 



§]. Seeds oval in cross section. 

 t Black, surface glossy. 



+ Size, 3 mm. x ^ mm.. 

 ii Size, If mm. x 4 mm., 

 tt Black, surface dull. 



i Hilum at centre of seed, 

 ii Hilum not at centre of seed, 

 ttt Light-brown, surface dull. 

 i Size, 6 mm. x 3 mm., 

 ti Size, Ii mm. x f mm., 

 tttt Dark-brown, surface dull, 

 ?2. Seeds more or less anther shape in cross section. 

 t Yellow, surface smooth. 

 + Size, 2] mm. x 5 mm., 

 ii Size, 5 mm. x If mm., 

 tt Yellow, surface striated; size, 1^ mm. x ^ mm., 

 ttt Dark brown, 

 tttt Black, 

 ttttt Red, 

 |3. Seeds irregular in cross section, 



+ Longitudinal section deeply lobed. 

 i Size, Ig mm. x h mm., 

 i+ Size, f mm. x \ mm., 

 tt Longitudinal section regular in outline. 



P. major. 

 P. Rugelii. 



P. eriopoda. 

 P. decipiens. 



P. cordata. 



P. Tweedyi. 



P. maritima. 



P. minima. 



P. lanceolata. 



P. Virginica. 



P. Patagonica. 



P. hirtella. 



P. rubra. 



P. elongata. 



P. heterophylla. 



P. Bigelovii. 



Plantago, Tourn. Plantain. 



Calyx of four imbricated persistent sepals, mostly with dry membranaceous 

 margins. Corolla salver form or rotate, withering on the pod, the border four- 

 parted, or rarely two, in all or some flowers with long and weak exserted fila- 

 ments, and fugacious two-celled anthers. Ovary two (or in No. 8, falsely, three- 

 four) celled, with one-several ovules in each cell. Style and long hairy stigma 

 single, filiform. Capsule two-celled, two-several seeded, opening transversely, so 

 that the toi) falls off like a lid and the loose partition (which bears the peltate 

 seeds) falls away. Embryo straight, in fleshy albumen. Leaves ribbed. Flow- 

 ers whitish, small, in a bracted spike or head, raised on a naked scape. 



