Abutilon Darwinii Hook /. 
The Malvaceae do not 'belong to the plants, which have water- 
calyces, although in many respects they resemble them 
theTr 1 TK Water ’ h0ney iS here seereted on the surface of 
the calyx. This secretion is especially copious in the species o (Abu- 
Mon. If an adult flowerbud be enclosed ovehiight in a glass-boi 
a fairly large quantity , of nectar will be found on the broad flat 
bottom of the calyx, when the flower has opened next morning. In 
he hanging flower the nectar runs down along the inner surface of 
he calyx. Without having previously satisfied ourselves, that we are 
ere ealing with glucose, we might suppose that Abutilon belonged 
to the plants with water-calyces. 
In 1879 B_.) gave'a detailed description of this nectary at 
the bottom of the calyx in Malvaceae . 
It consists of a tender-walled tissue of small, irregular cells, of 
which those which constitute the epidermis have grown out to a 
mu ice u ai thread-like trichome to which Behrens gave the inappro¬ 
priate name of “Sekretions-Papille”. As the apical cells of these 
papillae secrete, they together constitute an extensile secretion area. 
ow ehrrns observed that the outflow of nectar is preceded by 
pio uc ion o mucilage in the apical cell, taking place with formation 
o co agen. t is remarkable that trichomes of exactly the same shape 
T , EHRE ^ S a . Sekretions-Papillen”, which compose the nectary, are 
found ,m different places,, both in the flower and outside. 
estler w o in his paper on the water-secretion of the leaves of 
Matvaceae ), mentioned the various trichomes which may be found 
in ese plants, distinguishes them as “ lang-gestielte, mehrzellige 
rusenhaare , but * only found them in Abutilon in comparatively 
small numbers, probably because he did not examine the very youngest 
parts for the presence of these glands. 
thick J he ,° UtSide ° f the J0Ung caI ^ x ’ which in addition bears a 
Uj. -. 1J1 8 - 0 long, pointed, stellate hairs (Biischelhaare, Stern- 
of the • ^11 are | f0Unfl in reIativei 7 small numbers, but the outside 
anri ,J° r0 a> t JG VQry youn £ peduncle and petiole, the young stipules 
n ' G1 ; 'congest leaves are thickly covered by them. 
vounli T ° ng P ° inted hairs and “Sekretions-Papillen” the 
cl lint, n i° a [ X 88 an a * >UI1 dant covering of much smaller glands of 
P _ sha Pe, which consist of one or two stalk-cells and 4 secre- 
