TREES AND SHRUBS 139 



bilabiate, sometimes obscurely so, upper lip entire or trif id ; lower lip 

 bifid; tbroat smooth; corolla mostly conspicuously colored, blue or 

 red; bilabiate, the upper lip erect; lower lip 3-lobed; stamens 2; 

 stigmas 2 sometimes unequal; nutlets ovoid or 3 sided, smooth. 



Leaves oblong to elliptic, acute or obtuse, en- 

 tire or the lowermost obscurely dentate, 

 nearly glabrous; calyx conspicuously veined, 

 not accrescent; plant a foot high or less. 1. S. lycioides. 



Leaves ovate or deltoid-ovate, acute, crenate, 

 densely canescent beneath; calyx not con- 

 spicuously veined, accrescent in fruit; plant 

 3 feet high or more. 2. S. pinguifolia. 



SOLONACEAE. Potato Family. 



This is a large family containing several valuable eco- 

 nomic genera the best known of which are those containing 

 the potato, tomato, ground-cherry, tobacco, Petunia, etc. It 

 is quite well represented in New Mexico but most of the 

 species are herbaceous. A single genus of shrubs occurs 

 within our limits as follows: 



\. ■: *■ '" LYCIUM L. 



Shrubs with divaricate branches many ending in thorns ; wood 

 hard and tough; leaves alternate or often fascicled by the reduction 

 of the stem; thickish, entire or undulate; flowers mostly in few 

 flowered axillary cymes; calyx of 5 sepals united at the base, per- 

 sistent in fruit; corolla funnelform to almost salverform; greenish 

 or purplish, lobes 5, obtuse; stamens 5, mostly exserted; ovary 2- 

 celled; berry globose, fleshy bright scarlet when mature, rather 

 pleasant to taste. 



Flowers greenish, 20 mm. long; older branches 



dark reddish-brown. 

 Flowers purplish, 12 mm. long or less; branches 

 grayish. 

 Corolla 8 to 12 mm. long; leaves large and 



numerous. 

 Corolla 5 mm. long; leaves small and few. 



BIGNONIACEAE. 



Shrubs or low trees with simple or pinnately compound ex- 

 stiplate leaves and large perfect flowers in terminal racemes; calyx 

 hypogynous of 2 more or less united sepals; corolla irregular, large, 



1. 



L. 



pallidum. 



2. 



L. 



torreyi. 



3. 



L. 



parviflorum 



