7. scheucbzeriaceae— 9. gramineae. h. 



tinct. Ovules 2 — 8 in each carpel. Fruits dehiscent. 1 genus 

 2 species. 

 APONOGETON Thb. 



1. natalense Oliv. Common all over. 



2. spathaceum var junceum. Hk. f. Common in moist 



spots. All over. Mont Aux Sources, 9,500 ft. 



FAMILY 7— SCHEUCHZERIACEAE. 



Marsh herbs with linear radical leaves. Flowers in spikes 

 regular, hermaphrodite. Perianth segments 6, green. Stamens 

 3 — 6. Ovary 3 — 6 celled. Ovule 1 in each cell. 1 genus 3 species. 

 TRIGLOCHIN L. 



1. bulbosum L. Coast and Midlands. 



2. laxiilorum Gass. Coastbelt. Mudflats. 



3. striatum Ruiz and Pav. Coastbelt. 



FAMILY 8— HYDROCHARITACEAE. 



Aquatic herbs. Leaves with axillary scales. Flowers, enclosed 

 when young by 1 or 2 bracts, usually unisexual. Perianth simple 

 or of calyx and corolla. Stamens 2 — 12. Ovary inferior 1 celled. 

 Placentas parietal. Seeds exendospermic. 1 genus 1 species. 

 LAGAROSIPHON Harv. 



muscoides Harv. var major Ridl. Swamps near Greytown. 



FAMILY 9— GRAMINEAE. 



Grasses. Stems usually hollow. Leaves alternate in 2 rows, 

 consisting of (a) a sheath, (b) a blade, and (c) a ligule, placed 

 transversely between sheath and blade. Flowering axis is the 

 culm. Main inflorescence a spike, a raceme or a panicle. Ulti- 

 mate branch of inflorescence is the spikelet, consisting of an 

 axis (the rachilla), which bears scalelike bracts. 2 lowest bracts 

 are glumes, others are valves with flowers in their axils sub- 

 tended behind by pales. Valves may be empty. Glumes or valves 

 or both may be prolonged upwards into a short mucro or longer 

 awn. Flowers hermaphrodite or unisexual. Perianth of 2 

 lodicules (scales) or wanting. Stamens 3 (rarely 1 2 4 or 6). 

 Anthers versatile. Ovary 1. Styles or stigmas 2 feathery. Fruit 

 a carvopsis, rarely a utricle. Seed endospermic. 67 genera, 227 

 species. 



1. Spikelets all sessile in the notches of a simple spike. 



65 LOLIUM. 

 Spikelets not all sessile in the notches of a simple spike. 2. 



2. Spikelets secund (all on one side of rachis). 3. 

 Spikelets not secund. 17. 



