COEOLLA. 



7 



Table II. — Variation 



length of Corolla tube 



Indian species 



SlPHONANTHA 



I. 



II. 



III. 



SlPHONANTHiE. 



IV. 



v. 



Limits of variation in the 



SPECIES 



o 



Of corolla tube 



Of calyx. 



- 



o 



a 



i 



be 



© » 



LlMIT8 OP VARIATION IN 

 INDIVIDUAL SPECIMEN* 



1. Eusiphonanthae 



P. bicornuta 

 elephantoides 



longiflora 



megalantha 



rhinanthoides 



siphonantha 



bella 

 Przewalskii 



••• 



•• • 



2:5 .Of corolla tube. 



Of calyx 



Localities of the speci 

 mens in column IV. 



• # • 



• •• 



• • • 



• • • 



• • t 



16—26 mm. 

 18 mm. 



33—74 mm. 



21 - 94 mm. 



14—27 mm. 

 22—60 mm. 



2. Llacranthae. 



26—36 mm. 

 28—34 mm. 



15 — 19 mm. 

 145 mm. 



10—1 1 mm. 



1 5 — 20 mm. 



11-13 mm. 



9- 10 mm. 



15 mm. 

 10—12 mm. 



22 



1 



32 



33 

 21 



58 



6 

 3 



21—26 mm. 



18 mm. 



42 — 65 mm. 



40 — 54 mm. 

 44—S9 



14 



24 



04 mm. 

 21 mm. 

 29 mm. 



Dalton i 

 Elwesii 

 Garckeana 

 macrantha 



• • • 



# • • 



#•* 



• • « 





nepalensis 

 robusta 

 Scully ana 



t • • 





3. Gyrorrhynch® 



1 7—23 mm 



13— 15 mm 

 16—28 mm 

 10—13 mm 



21—26 mm 

 11—12 mm, 



20—22 mm 



12 mm 

 11 — 17 mm 

 14—17 mm 



13 mm 



80- 33 mm. 



28—30 mm. 



16 mm. 

 14*6 nun. 



10 mm. 

 10*5 mm. 



16 mm. 



12'6 mm. 



9*6 mm. 



15 mm. 

 10 mm. 



Pangi. 



Kashmir. 



Alpine Sikkim. 

 .Chumbi. 



Buck-rluM'in, Chumbi. 

 Panni. 



Lebang Pass in Ka 

 maon. 



Chuui-la-ree. 

 Phari. 



7 

 10 



7 

 8 



integrifolia 



• • « 



17 — 24 mm. 



14 mm. 

 11—12 mm. 



18—19 mm. 



1 

 3 



5 



12—13 mm. 



4 



18-20 mm. 



13 mm. 



16—19 mm. 



11—13 mm. 



21—26 mm. 



11 mm. 



20—22 mm. 



12 mm. 

 11 mm. 

 16 mm. 



13 mm. 



14 mm. 



11 mm. 



18 5 mm. 



17—21 mm, 



in W. 



Donkia-la. 



Thari. 



Tan-ka-la.' 

 Nampa Gadh 

 Nepal. 



Kogling in E. Nepal. 

 Alpine Sikkim. 

 Jongri. 



13 mm. 





Phari 





The figures in column III indicate the number of gatherings from which the measurements given in column II are 

 taken ; to give the number of specimens measured in every case seems unnecessary. Measurements of over 200 speci- 

 mens of P. siphonantha have been made, and measurements of 23 specimens of P. nepalensis. The only species in the 

 list whereof the measurements must be considered inconclusive is P. elephantoides, of which but one gathering contain- 

 ing only two specimens has been available. The localities in column V are those of the individual specimens whose 

 measurements are given in column IV, 



This table has been limited to § Siphonantha because this is the section of which an 



and is the one in which most use has been made of 



elongated tube is most characteristic 



its morphological 

 that the character 



dex 



the relative length of calyx and 



olla tubes. The table show 



too 



ble to be capable of other than a very general application 



The morphological index of the porti 



of tube that elongates 



■th 



point 



f 



inser- 



tion of the stamens 



affords, on the other hand, a character of high diagnostic 



val 



ue. 



When the staminal insertion is carried to the apex of the tube, the calibre is uniform 



when not carried so far, the tube, as a rule, enlarges slightly upwards from 



ace even among Siphonantha in those species 



throughout 

 this point 



This 



enlargement takes 

 where the staminal insertion is some 

 Daltoni). But there are many species 



distance below the apex (P 



tka, Scully 



) 



m 



particularly among Orthorrhyncha, where 



the staminal insertion is at the middle of the tube (P. flexuosa 



chumbica), and som 



both amongst Orthorrhyncha (P. pectinata) and amongst Rhyncholopha (P. ^o), 



pposite the top of the ovary, yet with the tube cylmdnc 



where the staminal insertion is 



throughout or 



very 



htly 



enlarged 



at th 



apex 



The 



contrary 



