Two kinds of rush by Leonardo da Vinci

A sheet by Leonardo da Vinci (Windsor Royal Collection 12427, 1510 ca) illustrates two kinds of rush.

Transcription and plant identifications are provided in footnote 44 from Visualizing Medieval Medicine and Natural History, 1200–1550 by Jean A. Givens, Karen M. Reeds, Alain Touwaide

Pedretti, Richter Commentary, vol.1 321-2,R 481

Transcription: 
First plant
Quesstossto [sic] e il fiore della 4a delgiuncho e decquel chettiene il principato della loro alteza la quale ecciede la lungheza dj 3 in 4 .br. ella grossezza dundjto nella nel suo nasscimento ede djpulita essnplijcie. retondjta de dj bello coloro verdeellj sua fiori participano dj colore leonhno . e quessto tale giuncho nasscie ne padulj ecc ellj picholi fiori che pendano fori della sua semenza dono giallj.

Second Plant
Quessto e il fiore della 3a sorte overo spetie dj giunchi . ella sua alteza e circha vno .br. [emezo] ella sua grosseza he vno terzo djdjto . malla detta grosseza e trianghulare cone quali angholj e il cholore del giuncho e de fiori essimjle al giuncho di sopra.”

My translation of the transcribed text:

First Plant:
This is the flower of the 4th [kind] of rush, which is the highest of them all, more than 3 or 4 fathoms. Its thickness is of one inch when it sprouts. It has a beautiful and simple round shape [i.e. section]. It has a nice green color. Its flowers have a somehow leonine color. This rush grows in marshes etc. The smallest flowers hanging out of the spikes are yellow.

Second Plant:
This is the flower of the 3rd kind or type of rush. Its height is about one [and a half – deleted] fathom. Its thickness is one third on an inch, but this thickness [i.e. section] is triangular with some angles [?]. The plant and the flowers have the same color as the rush above.

Identification of the plants:
Clark, Catalogue of Drawings, vol 1,68 RL 12427. Emboden, Leonardo da Vinci on Plants, 148, identifies the first rush as Scirpus lacustri. Emboden and Clark repeat de Toni's typographical error in identifying the second rush as Cyperus sertonius [sic], that is. C. serotinus. In “The Plant Illustrations of Leonardo da Vinci,”Bulington Magazine 121 (1979): 553-62, Brian Morley identifies it as Cyperus rotundus.