Four Scientific Essays ...

Agaricus Mycena Agaricus Pleurotus angle of divergence arrangement Attis spiders beautiful black to green Boynton bracts brown Buitenzorg changing the colour chicory circles coal-dust common composite flowers cotyledons curves decorative designs diagram dicotyledons discoid florets disk dry sand Euphorbium cyparissias evolution evolved facoltà fact faculty of changing flower-heads flowering-season force Four Scientific Essays fructification fungi fungus geometrical globe-flower growing host infinite number intybus leaf leaves ligules Marasmius mechanical monocotyledons monopetalous Nature observations occhi frontali ox-eye daisy pair of eyes parasitic patterns pentagon perhaps perithecia Peziza phyllotaxis phyllotaxis series pileus plants Polyporus Pond Wood R. I. Pocock ragni ragno Attis rays Redcar represented right to left ripple-marks ripples in dry round seed-head seeds Senecio Sestri Levante smaller species specimen Sphæria acuta spiral spores stem suppose symmetry tide-forces Travancore tuft variety vertical verticils W. W. STRICKLAND waves whity-brown wild chicory wind wind-force