i 7 o ROSE ORDER 



y. Style flattened, hairs down the inner 



face Lathyrus 



2. Shrubs or trees 



a. Leaflets dotted with glands, 8-25 pairs ; flowers 



purple, small ; petal 1 Amorpha 



b. Leaflets not dotted, 4-7 pairs ; flowers rose- 



pink, pea-like Robinia 



Amorpha Linne 1753 Amorpha, False Indigo 

 (Gr. a-, without, morphe, form, from the absence of 4 petals) 



PL 29, fig. 4-5. 



Sepals 5, united into a bell-shaped calyx, petal 1, violet, blue or white, 

 standard erect, folded about the stamens and the style, wings and keel lack- 

 ing, stamens 10, united below, ovary 2-celled, pod hardly opening, 1-2- 

 seeded ; flowers in terminal spike-like racemes ; leaves odd-pinnate, the 

 leaflets dotted with tiny glands ; shrub. 



1. Stems 3-15 ft. high; leaflets 2-5 cm. long; pods 



usually 2-seeded A. fruticosa 



2. Stems 1-3 ft. high; leaflets .5-1.5 cm. long; pods 



usually 1-seeded 



a. Leaflets densely gray-hairy, 21-49; flower- 



spikes usually several A. canescens 



b. Leaflets smooth, or nearly so, 13-19; flower- 



spikes solitary A. nana 



Aragalus Necker 1790 



(Possibly modeled after Astragalus, from Gr. ara, curse) 



(Oxytropis DeCandolle; Spiesia Necker.) 



PI. 28, fig. 1; PI. 29, fig. 11, 12. 



Sepals 5, united into a nearly equally toothed calyx, petals 5, red, blue, 

 yellowish or white, standard erect, wings oblong, keel with a distinct beak, 

 stamens 10, 9 united, pod 1-2 celled, 2-valved ; flowers mostly in racemes, 

 spikes or heads ; leaves odd-pinnate, typically hairy ; mostly stemless peren- 

 nials. 



1. Flowers 6-7 mm. long; pods hanging, 5-6 times 



as long as the calyx A. defiexus 



2. Flowers 1-2 cm. long; pods not hanging, enclosed 



in the calyx, or 1-3 times longer 



