Someone else would have to tend Jimmy's flowers now, but probably no one would, for his flowers were the Martian lilies. And Martian lilies no longer were a novelty.
It had been the lilies that started the whole thing, this crazy parade of men who went into space and died.
Slightly over twelve years ago, Dr. Steven Alexander reported that, from his observatory on Mt. Kenya, he had communicated with Mars by ultrashort wave radio. It had been a long and arduous process. First the signals from Earth, repeated in definite series, at definite intervals. And then, finally, the answer from the Red Planet. After months of labor slow understanding came.
"We send you," signalled the Martians. "We send you." Over and over again. A meaningless phrase. What were they sending? Slowly Alexander untangled the simple skein of thought. Mars finally messaged: "We send you token!" That word "token" had been hard. It represented thought, an abstract thought.
The world waited breathlessly for the token. Finally it came, a rocket winging its way across space, a rocket that flashed and glinted in the depth of space as it neared Earth. Kept informed of its location by the Martians, Earth's telescopes watched it come. It landed near Mt. Kenya, a roaring, screaming streak of light that flashed across the midnight sky.
Dug up, it yielded an inner container, well-insulated against heat and cold, against radiation and shock. Opened, it was found to contain seeds. Planted, jealously guarded, carefully tended, the seeds grew, were the Martian lilies. They multiplied rapidly, spread quickly over the Earth.
Back on Earth today the Martian lilies grew in every hamlet, clogged the fence rows of every farm. Relieved of whatever natural enemies and checks they might have had on their native planet, they flourished and spread, became a weed that every farmer cursed whole-heartedly.
Their root structure probed deep into the soil. Drought could not kill them. They grew rapidly, springing to full growth almost overnight. They went to unkillable seed. Which was what might have been expected of any plant nurtured on the stubborn soil of Mars. Earth, to the Martian lilies, was a paradise of air and water and sunlight.
And, as if that first token-load had not been enough, the Martians kept on sending rocket loads of seeds. At each opposition the rockets came, each announced by the messages from the Martian transmitter. And each of them landed almost precisely on the spot where the first had landed.
That took mathematics! Mathematics and a superb knowledge of rocketry. The rockets apparently were automatic. There was no intelligence to guide them once they were shot into space. Their courses must have been plotted to the finest detail, with every factor determined in advance. For the Martian rockets were not aimed at Earth as one broad target but at a certain spot on Earth and so far every one of them had hit that mark!