SPRING FLORA OF MANHATTAN. 



Ovary 1-celled; leaves deeply parted, 



Hydrophyllaceae 54 

 Ovules numerous; ovary 2-crUed .Solanaceae 58 

 Corolla irregular. 



Ovary deeply 4-lobed around the style Labiatae 57 



Ovary not lobed. 



2-celled; ovules numerous Scrophularktceae 59 



2-4-celled; ovules 4 Vevltenaceae 5(> 



DESCRIPTIVE LIST. 



MONOCOTYLEDON EAE. 

 1 GRAMINE^E. 



Perianth none. Stamens usually 3. Ovary one, superior, 1-celled, 

 1-ovuled. Styles and stigmas 2. Fruit a earyopsis, the seed grown fast 

 to the pericarp. Flower in the axil of a bract (flowering glume) with a 

 2- keeled bract (palet) between the flower and the axis. The flowers are 

 arranged in 2 ranked clusters (spikelets), the two glumes at the base of 

 the spikelet being empty. The spikelets may be from one to many 

 flowered. Herbaceous plants with 2-ranked, alternate, nerved leaves 

 and sheaths split on the side opposite the blade 



1. Spikelets with usually 4 glumes and one perfect flower, jointed upo i 

 the pedicel below the glumes 



Spikelets in loose panicles Panicum 



Spikelets in spike-like panicles Chamaemphis 



2. Spikelets not jointed below the glumes, 1-many flowered; glumes 

 3 when 1-flowered. 



a Spikelets 1 -flowered, not on a zig-zag rhachis. 



Inflorescence loosely panicled Ayrostis 



Inflorescence spike-like Alajyecurus 



b. Spikelets dioecious; staminate in two rows, forming a 1-sided 



spike. Bulbilix 



c Spikelets more than 1-flowered, pedicelled. 

 *Flowering glume 3-nerved. 



Empty glumes similar, acute Koeleria 



Empty glumes very dissimilar, upper very obtuse Eatoniq 



* *Flowering glume 5-nerved 

 Glumes compressed and keeled 



Awn-pointed; spikelets in 1-sided clusters Dactylis 



Not awn-pointed; spikelets in panicles Pott 



Glumes convex on back. 

 Awn, if present, from tip of glume Festuo$ 



