56 



A SYNOPSIS OF THE VEGETABLE KINGDOM. 



139. CYCADACE.E. 



A. Leaf segmtnts circinately 

 involute in vernation : 

 female cones proliferous 

 after antliesis : scales 

 elongate, the margins 

 bearing 2-man,v ovules. ..1- CvcAS. 

 AA. Leaf segments straight in 

 vernation : female cones 

 deciduous after anthesis ; 



scales peltate 



B. Cone scales superposed in 



vertical series 



c. Shield of the scales 

 transversely 2-horned 



at apex 2. Cer.\tozamia. 



cc. Shield of the scales 

 truncate, not horned 



at apex 3. Zamia. 



BB. Cone scales overlapping in 



alternating series 



c. Leaf segments ribbed 

 and nerved ; nerves 

 spreading on either 

 side of midrib, very 

 numerous, simple or 



forked 4. Staxgeria. 



cc. Leaf segments with 

 parallel, longitudinal 



nerves 



D. Shield of cone scales 

 t]at, erect, ovate- 

 cordate 5. DiOON. 



DD. Shield thickened, as- 

 cending, usually 

 prolonged Into ah 

 erect, acuminate 



blade 6. Macrozamia. 



DD. Shield thickened, 

 truncate, decurved 

 at apex 7. Encephalartos. 



140. IIYDROCHARIDACE.E. 



A. Stem elongated, submerged, 

 everywhere leafy : Ivs. 

 short : spathes small, 

 sessile in axils : placentae 

 little prominent in ovary. 1. Elodea, 

 AA. Stem very short, sometimes 

 emitting creeping or lioat- 

 ing stolons : Ivs. crowded, 

 immersed, sessile, elongat- 

 ed : spathes pedunculate: 

 placentae hardly promi- 

 nent 2. Vallisneria. 



AAA. Stem very short : Ivs. 

 crowded some sessile and 

 submerged, others (ex- 

 cept in Stratiotes) long- 

 stalked, with a floating 

 blade : spathes pedun- 

 cled : placentiB of 2 la- 

 mellie, strongly intruded, 

 dividing the ovary more 

 or less perfectly into 6 



cells 



B. Styles 3 : stamens 3-0. 3. Limnobicm. 



BB. Styles 6. 2-fld 



c. Stamens with 0, 2-fid. 

 Hlaments, of which 

 3 have 2 anthers and 

 3 nave 1 anther. ...4. Hydrocharis. 

 cc. Stamens 11-15 5. Stratiotes. 



141. ORCHIDACE.li;. 



(Summary of subfamilies.) 



(By Heinrich Ilasselbring. ) 



Mostly following Pfitzer'in 



Engler and Prantl : Die 



Natiirllchen Pfanzenfami- 



llen 



Fertile anthers 2, rarely 3 : 



stigmas 3 '. . . . Slbfa.mily 1. Dian- 



^ ., DRJE. 



Fertile anther 1 : stigmas 2 



mostly confluent Sdbfamily 2. Mon- 



ANDRai. 



.2. Ophrys Tribe, 



(Summary of Tribes.) 



SUBFA.MILY I. DIAXDRJE. 



Sole tribe 1. Cypripedium 



1 



SL-BFAMILY II. MONANDRJE. 



A. Pollinia with appendages 

 (caudicles) at the base: 

 fllaments broad : anthers 



persistent 



AA. Pollinia with appendages at 

 the apex or without ap- 

 pendages : filaments nar- 

 row and delicate in con- 

 sequence of which the 

 anthers are easily decid- 

 uous 



b. Inflorescence terminal, 

 ending the growth of 

 the flowering shoot. . . . 

 c. Leaf-arrangement con- 

 volute 



D. Blade and sheath of 

 the Ivs. continu- 

 ous: anthers with- 

 ering, persistent ; 

 pollenmasses most- 

 ly granular 3. Neottia Tribe. 



DD. Blade of the leaves 

 distinctly differen- 

 tiated from the 

 sheath and sepa- 

 rating from the 

 latter along a well- 

 marked line: an- 

 thers mostly de- 

 ciduous : pollinia 

 waxy, rarely gran- 



nular 



B. Stems slender, or 

 with all the inter- 

 nodes equally 

 thickened : fls. 



mostly spurred : 



pollinia 8 4. thonia Tribe. 



EE. Stems with a single 

 thickened inter- 

 node ( p s e u d o- 

 bulb) : fls. rarely 

 spurred: pollinia 



•1 5. CCELOGYNB TRIBE. 



cc. Leaf arrangement con- 

 duplicate 



D. Sepals smaller than 

 or equalling the 

 petals, the latter 

 and the labellum 

 the more conspicu- 

 ous 



E, Lvs. not jointed at 

 base of blade : 

 foot of the col- 

 umn wanting or 

 forming a short 

 spur with the la- 

 bellum : pollin'a 

 4, without ap- 

 pendages 6. LiPABis Tribe. 



EE. Lvs. mostly jointed : 

 column with a dis- 

 distinct foot : pol 

 linia 2 or 4, pro- 

 vided with short 



stipes 7. POLYSTACHYA 



TMBB, 

 EEE. Lvs. jointed, mostly 

 neshy or leath- 

 ery : fls. large 

 with the labellum 

 larger than the 

 sepals : pollinia 4. 

 fi or 8, provided 

 wifh caudicles. ..8. LaJLIi TBIBB. 

 ef.eb. Lvs. jointed, longi- 

 tudinally folded 

 in the bud : pol- 

 linia without ap- 

 p e n d a g es : fls. 

 'arge 9. Sobralia Tbibb. 



