GENTIAN FAMILY 93 



Leaves lanceolate to ovate, 1-10 cm. wide 



a. Leaf bases in a mass of red-brown wool P. eriopoda 



b. Leaf bases without red-brown wool 



(1) Leaves lanceolate 



(a) Spike oblong, 1-3 cm. long P. lanceoldta 



(b) Spike cylindric, 3-6 cm. long P. Tweedyi 



(2) Leaves ovate to round 



(a) Pod ovoid, splitting circularly about the 



middle P. major 



(b) Pod oblong splitting circularly near the 



base P. Rugelii 



GENTIANALES GENTIAN ORDER 



GENTIANACEAE GENTIAN FAMILY 



Sepals 4-7, united, petals 4-7, united into a funnel-, bell-, club-, or 



saucer-shaped corolla, stamens 4-14, ovary 1-2-celled, style simple or none, 



stigma entire or 2-lobed or 2-cleft, capsule mostly splitting by 2 valves ; 



flowers in terminal or axillary clusters, or solitary at the ends of stems 



.or branches; herbs with opposite, entire, rarely whorled leaves. 



1. Style short and persistent, or none 



a. Corolla flat, saucer-shaped 



( 1 ) Flowers green ; leaves 3-6 in a whorl ; stem 

 2-5 ft. high Frasera 



(2) Flowers purple, blue or white; leaves op- 



posite ; stems .5-2 ft. high 



(a) Petals with a fringed nectary at base Swertia 



(b) Petals without fringed nectaries Pleurogyne 



b. Corolla tubular or bell-shaped Gentiana 



2. Style slender, thread-like, falling away at ma- 



turity 



a. Corolla bell-shaped Eustoma 



b. Corolla salver-shaped Frythraea t 



Erythraea Xecker 1790 Centaury 

 (Gr. erythraios, red, from the color) 



Sepals 4-5 united, petals 4-5. pink, white or yellow, united into a sal- 

 ! verform corolla, stamens 4-5, ovary 1 -celled, style slender, stigma 2-lobed, 



